A viewset for viewing and editing Modern Fortifications.

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            "id": 201,
            "polity": {
                "id": 181,
                "name": "it_roman_k",
                "long_name": "Roman Kingdom",
                "start_year": -716,
                "end_year": -509
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
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            "description": null
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            "id": 202,
            "polity": {
                "id": 185,
                "name": "it_western_roman_emp",
                "long_name": "Western Roman Empire - Late Antiquity",
                "start_year": 395,
                "end_year": 476
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
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        },
        {
            "id": 203,
            "polity": {
                "id": 188,
                "name": "it_st_peter_rep_1",
                "long_name": "Republic of St Peter I",
                "start_year": 752,
                "end_year": 904
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 204,
            "polity": {
                "id": 544,
                "name": "it_venetian_rep_3",
                "long_name": "Republic of Venice III",
                "start_year": 1204,
                "end_year": 1563
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "present",
            "comment": null,
            "description": " \"Venice's strategy of defense of its overseas territories was based on fortified cities and system of forts, provided with victuals and ammunition that were meant to enable resistance of long sieges (up to two years) until reinforcement arrived by sea. ... changes in military technology, especially the more effective use of artillery, necessitated a renewal of the systems of defense.\"§REF§(Arbel 2014, 206) Benjamin Arbel. Venice's Maritime Empire in the Early Modern Period. Eric Dursteler. ed. 2014. A Companion to Venetian History, 1400-1797. BRILL. Leiden.§REF§"
        },
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            "id": 205,
            "polity": {
                "id": 545,
                "name": "it_venetian_rep_4",
                "long_name": "Republic of Venice IV",
                "start_year": 1564,
                "end_year": 1797
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "present",
            "comment": null,
            "description": " \"Venice's strategy of defense of its overseas territories was based on fortified cities and system of forts, provided with victuals and ammunition that were meant to enable resistance of long sieges (up to two years) until reinforcement arrived by sea. ... changes in military technology, especially the more effective use of artillery, necessitated a renewal of the systems of defense.\"§REF§(Arbel 2014, 206) Benjamin Arbel. Venice's Maritime Empire in the Early Modern Period. Eric Dursteler. ed. 2014. A Companion to Venetian History, 1400-1797. BRILL. Leiden.§REF§"
        },
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            "id": 206,
            "polity": {
                "id": 149,
                "name": "jp_ashikaga",
                "long_name": "Ashikaga Shogunate",
                "start_year": 1336,
                "end_year": 1467
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " no evidence of these type of fortifications, but no source explicitly saying they were absent"
        },
        {
            "id": 207,
            "polity": {
                "id": 146,
                "name": "jp_asuka",
                "long_name": "Asuka",
                "start_year": 538,
                "end_year": 710
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " not possible at this time"
        },
        {
            "id": 208,
            "polity": {
                "id": 151,
                "name": "jp_azuchi_momoyama",
                "long_name": "Japan - Azuchi-Momoyama",
                "start_year": 1568,
                "end_year": 1603
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "unknown",
            "comment": null,
            "description": " ‘Previously castles had been little more than temporary fortifications of hilltops, but Father Frois' description of Nobunaga at work on his Nijo castle in 157 5 makes it clear that by the Momoyama period, they were built to last and to resist attacks by firearms.’ §REF§Mason, Richard Henry Pitt. 1997. A History of Japan: Revised Edition. Tuttle Publishing.p.185§REF§ ‘although the palatial castles of the Azuchi-Momoyama period were erected with defense against gunfire in mind, they were primarily a setting for daimyo displays of military and political power.’ §REF§Deal, William E. 2005. Handbook to Life in Medieval and Early Modern Japan. Oxford University Press.p.286.§REF§"
        },
        {
            "id": 209,
            "polity": {
                "id": 147,
                "name": "jp_heian",
                "long_name": "Heian",
                "start_year": 794,
                "end_year": 1185
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " no evidence of these type of fortifications, but no source explicitly saying they were absent"
        },
        {
            "id": 210,
            "polity": {
                "id": 138,
                "name": "jp_jomon_1",
                "long_name": "Japan - Incipient Jomon",
                "start_year": -13600,
                "end_year": -9200
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " No archaeological evidence for this. Moreover, the scholarly consensus is that the Jomon were relatively peaceful.<br>"
        },
        {
            "id": 211,
            "polity": {
                "id": 139,
                "name": "jp_jomon_2",
                "long_name": "Japan - Initial Jomon",
                "start_year": -9200,
                "end_year": -5300
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " No archaeological evidence for this. Moreover, the scholarly consensus is that the Jomon were relatively peaceful.<br>"
        },
        {
            "id": 212,
            "polity": {
                "id": 140,
                "name": "jp_jomon_3",
                "long_name": "Japan - Early Jomon",
                "start_year": -5300,
                "end_year": -3500
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " No archaeological evidence for this. Moreover, the scholarly consensus is that the Jomon were relatively peaceful.<br>"
        },
        {
            "id": 213,
            "polity": {
                "id": 141,
                "name": "jp_jomon_4",
                "long_name": "Japan - Middle Jomon",
                "start_year": -3500,
                "end_year": -2500
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " No archaeological evidence for this. Moreover, the scholarly consensus is that the Jomon were relatively peaceful.<br>"
        },
        {
            "id": 214,
            "polity": {
                "id": 142,
                "name": "jp_jomon_5",
                "long_name": "Japan - Late Jomon",
                "start_year": -2500,
                "end_year": -1200
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " No archaeological evidence for this. Moreover, the scholarly consensus is that the Jomon were relatively peaceful.<br>"
        },
        {
            "id": 215,
            "polity": {
                "id": 143,
                "name": "jp_jomon_6",
                "long_name": "Japan - Final Jomon",
                "start_year": -1200,
                "end_year": -300
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " No archaeological evidence for this. Moreover, the scholarly consensus is that the Jomon were relatively peaceful.<br>"
        },
        {
            "id": 216,
            "polity": {
                "id": 148,
                "name": "jp_kamakura",
                "long_name": "Kamakura Shogunate",
                "start_year": 1185,
                "end_year": 1333
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " no evidence of these type of fortifications, but no source explicitly saying they were absent"
        },
        {
            "id": 217,
            "polity": {
                "id": 145,
                "name": "jp_kofun",
                "long_name": "Kansai - Kofun Period",
                "start_year": 250,
                "end_year": 537
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " not possible at this time<br>"
        },
        {
            "id": 218,
            "polity": {
                "id": 263,
                "name": "jp_nara",
                "long_name": "Nara Kingdom",
                "start_year": 710,
                "end_year": 794
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " no evidence of these type of fortifications, but no source explicitly saying they were absent"
        },
        {
            "id": 219,
            "polity": {
                "id": 150,
                "name": "jp_sengoku_jidai",
                "long_name": "Warring States Japan",
                "start_year": 1467,
                "end_year": 1568
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 220,
            "polity": {
                "id": 152,
                "name": "jp_tokugawa_shogunate",
                "long_name": "Tokugawa Shogunate",
                "start_year": 1603,
                "end_year": 1868
            },
            "year_from": 1603,
            "year_to": 1854,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 221,
            "polity": {
                "id": 152,
                "name": "jp_tokugawa_shogunate",
                "long_name": "Tokugawa Shogunate",
                "start_year": 1603,
                "end_year": 1868
            },
            "year_from": 1855,
            "year_to": 1868,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "present",
            "comment": null,
            "description": null
        },
        {
            "id": 222,
            "polity": {
                "id": 144,
                "name": "jp_yayoi",
                "long_name": "Kansai - Yayoi Period",
                "start_year": -300,
                "end_year": 250
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " not possible at this time"
        },
        {
            "id": 223,
            "polity": {
                "id": 289,
                "name": "kg_kara_khanid_dyn",
                "long_name": "Kara-Khanids",
                "start_year": 950,
                "end_year": 1212
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " cannon forts were not available at this time<br>"
        },
        {
            "id": 224,
            "polity": {
                "id": 282,
                "name": "kg_western_turk_khaganate",
                "long_name": "Western Turk Khaganate",
                "start_year": 582,
                "end_year": 630
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " absent before the gunpowder era<br>"
        },
        {
            "id": 225,
            "polity": {
                "id": 41,
                "name": "kh_angkor_2",
                "long_name": "Classical Angkor",
                "start_year": 1100,
                "end_year": 1220
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " The walls of Angkor Thom, one of the Khmer Empire's most advanced fortifications formed 'a very regular square, and on each side is a stone tower.'§REF§(Zhou and Smithies 2001, p. 19)§REF§<br>"
        },
        {
            "id": 226,
            "polity": {
                "id": 40,
                "name": "kh_angkor_1",
                "long_name": "Early Angkor",
                "start_year": 802,
                "end_year": 1100
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " The walls of Angkor Thom, one of the Khmer Empire's most advanced fortifications formed 'a very regular square, and on each side is a stone tower.'§REF§(Zhou and Smithies 2001, p. 19)§REF§<br>"
        },
        {
            "id": 227,
            "polity": {
                "id": 42,
                "name": "kh_angkor_3",
                "long_name": "Late Angkor",
                "start_year": 1220,
                "end_year": 1432
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " The walls of Angkor Thom, one of the Khmer Empire's most advanced fortifications formed 'a very regular square, and on each side is a stone tower.'§REF§(Zhou and Smithies 2001, p. 19)§REF§"
        },
        {
            "id": 228,
            "polity": {
                "id": 43,
                "name": "kh_khmer_k",
                "long_name": "Khmer Kingdom",
                "start_year": 1432,
                "end_year": 1594
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " 'The initial move seems to have been to Srei Santhor, about 30 km (19 miles) northeast of Phnom Penh, at some time in the fourteenth century; then, briefly, to Phnom Penh itself. By about 1528, the Cambodian court under its first great Post-Angkorian king, Ang Chan I, had moved once and for all to the all to the Quatre Bras region, establishing a new capital at Lovek (Longvek), on the right bank of the Tonle Sap River, 50 km (30 miles) north of Phnom Penh. Love, like Udong and Phnom Penh- the town s that succeeded it as the capital- was thoroughly international, with foreign quarters for Malay, Japanese, and Chinese traders (there were as many as 3,000 of the last in the 1540s). There Ang Chan (who really did exist) built a golden palace and at least four major wats, erecting a huge, four-faced Buddha of wood, the stone foundation of which survive in one of the town's vicars. The capital was fortified by earthen ramparts topped with palisades; these ramparts, which form a huge rectangle, are still visible.'§REF§(Coe 2003, pp. 208-209)§REF§<br>"
        },
        {
            "id": 229,
            "polity": {
                "id": 39,
                "name": "kh_chenla",
                "long_name": "Chenla",
                "start_year": 550,
                "end_year": 825
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " 'The 7th century appears in the inscriptions as a time of relative prosperity, and the near absence of fortifications may indicate that warfare was rare, and not very destructive when it occurred. Even when impressive city walls were built, at Angkor Borei, increasingly viewed as a possible site for the capital of the Funan, there is archaeological opinion that they were for water control in the city, not for protection from attack.'§REF§(Vickery 1998,  317)§REF§"
        },
        {
            "id": 230,
            "polity": {
                "id": 37,
                "name": "kh_funan_1",
                "long_name": "Funan I",
                "start_year": 225,
                "end_year": 540
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " There are no indications that the wall surrounding Angkor Borei was used as a defensive mechanism, there are no guardhouses, gateways, or bastions which may indicate that the wall was not made for military purposes. §REF§(O'Reilly 2007, p. 107)§REF§"
        },
        {
            "id": 231,
            "polity": {
                "id": 38,
                "name": "kh_funan_2",
                "long_name": "Funan II",
                "start_year": 540,
                "end_year": 640
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " There are no indications that the wall surrounding Angkor Borei was used as a defensive mechanism, there are no guardhouses, gateways, or bastions which may indicate that the wall was not made for military purposes. §REF§(O'Reilly 2007, p. 107)§REF§"
        },
        {
            "id": 232,
            "polity": {
                "id": 35,
                "name": "kh_cambodia_ba",
                "long_name": "Bronze Age Cambodia",
                "start_year": -1200,
                "end_year": -501
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 233,
            "polity": {
                "id": 36,
                "name": "kh_cambodia_ia",
                "long_name": "Iron Age Cambodia",
                "start_year": -500,
                "end_year": 224
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 234,
            "polity": {
                "id": 463,
                "name": "kz_andronovo",
                "long_name": "Andronovo",
                "start_year": -1800,
                "end_year": -1200
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 235,
            "polity": {
                "id": 104,
                "name": "lb_phoenician_emp",
                "long_name": "Phoenician Empire",
                "start_year": -1200,
                "end_year": -332
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 236,
            "polity": {
                "id": 432,
                "name": "ma_saadi_sultanate",
                "long_name": "Saadi Sultanate",
                "start_year": 1554,
                "end_year": 1659
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 237,
            "polity": {
                "id": 434,
                "name": "ml_bamana_k",
                "long_name": "Bamana kingdom",
                "start_year": 1712,
                "end_year": 1861
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " Siege cannon not established in this period."
        },
        {
            "id": 238,
            "polity": {
                "id": 427,
                "name": "ml_jenne_jeno_1",
                "long_name": "Jenne-jeno I",
                "start_year": -250,
                "end_year": 49
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 239,
            "polity": {
                "id": 428,
                "name": "ml_jenne_jeno_2",
                "long_name": "Jenne-jeno II",
                "start_year": 50,
                "end_year": 399
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 240,
            "polity": {
                "id": 430,
                "name": "ml_jenne_jeno_3",
                "long_name": "Jenne-jeno III",
                "start_year": 400,
                "end_year": 899
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 241,
            "polity": {
                "id": 431,
                "name": "ml_jenne_jeno_4",
                "long_name": "Jenne-jeno IV",
                "start_year": 900,
                "end_year": 1300
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 242,
            "polity": {
                "id": 229,
                "name": "ml_mali_emp",
                "long_name": "Mali Empire",
                "start_year": 1230,
                "end_year": 1410
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 243,
            "polity": {
                "id": 433,
                "name": "ml_segou_k",
                "long_name": "Segou Kingdom",
                "start_year": 1650,
                "end_year": 1712
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " Siege cannon not established in this period.<br>"
        },
        {
            "id": 244,
            "polity": {
                "id": 242,
                "name": "ml_songhai_2",
                "long_name": "Songhai Empire - Askiya Dynasty",
                "start_year": 1493,
                "end_year": 1591
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 245,
            "polity": {
                "id": 283,
                "name": "mn_turk_khaganate_1",
                "long_name": "Eastern Turk Khaganate",
                "start_year": 583,
                "end_year": 630
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " According to personal communication with N. Kradin. §REF§(Kradin 2015, personal communication)§REF§"
        },
        {
            "id": 246,
            "polity": {
                "id": 288,
                "name": "mn_khitan_1",
                "long_name": "Khitan I",
                "start_year": 907,
                "end_year": 1125
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " Before the time of modern cannon forts"
        },
        {
            "id": 247,
            "polity": {
                "id": 267,
                "name": "mn_mongol_emp",
                "long_name": "Mongol Empire",
                "start_year": 1206,
                "end_year": 1270
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 248,
            "polity": {
                "id": 442,
                "name": "mn_mongol_early",
                "long_name": "Early Mongols",
                "start_year": 1000,
                "end_year": 1206
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": null
        },
        {
            "id": 249,
            "polity": {
                "id": 443,
                "name": "mn_mongol_late",
                "long_name": "Late Mongols",
                "start_year": 1368,
                "end_year": 1690
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 250,
            "polity": {
                "id": 278,
                "name": "mn_rouran_khaganate",
                "long_name": "Rouran Khaganate",
                "start_year": 300,
                "end_year": 555
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Modern_fortification",
            "modern_fortification": "absent",
            "comment": null,
            "description": " Not in use until much later."
        }
    ]
}