Inscriptions in the neighboring Indianized state Champa and accounts left by writers in Đại Việt, a Vietnam precursor state, say that Suryavarman staged three major but unsuccessful attacks on Dai-Viet, sometimes with the support of Champa.
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Ryukyuan ships, often provided by China, traded at ports throughout the region, which included, among others, China, Đại Việt (Vietnam), Korea, Japan, Java, Malacca, Pattani, Palembang, Siam, and Sumatra.
Trần Anh Tông (1276–1320), given name Trần Thuyên, was the fourth emperor of the Trần Dynasty, reigning over Đại Việt from 1293 to 1314.
Trần Dụ Tông (1336–1369), given name Trần Hạo (陳暭), was the seventh emperor of the Trần Dynasty, and reigned over Đại Việt from 1341 to 1369.
Trần Duệ Tông (Hán tự: 陳睿宗, 1337–1377), given name Trần Kính (陳曔), was the ninth emperor of the Trần Dynasty who reigned Đại Việt from 1373 to 1377.
Trần Hiến Tông (1319–1341), given name Trần Vượng (陳旺), was the sixth emperor of the Trần Dynasty who reigned Đại Việt from 1329 to 1341.
Trần Minh Tông (1300–1357), given name Trần Mạnh (陳奣), was the fifth emperor of the Trần Dynasty who ruled Đại Việt from 1314 to 1329.
Trần Nghệ Tông (1321–1394), given name Trần Phủ (陳暊), was the eighth emperor of the Trần Dynasty who reigned Đại Việt from 1370 to 1372.
Trần Nhân Tông (1258–1308), given name Trần Khâm, was the third emperor of the Trần Dynasty, reigning over Đại Việt from 1278 to 1293.
Trần Phế Đế (1361–1388), given name Trần Hiện, was the tenth emperor of the Trần Dynasty who reigned Đại Việt from 1377 to 1388.
Trần Thánh Tông (1240–1290), given name Trần Hoảng (陳晃), was the second emperor of the Trần Dynasty, reigning over Đại Việt from 1258 to 1278.
Trần Thiếu Đế (Born 1396, date of death unknown), given name Trần An, was the twelfth and the last emperor of the Trần Dynasty who reigned over Đại Việt from 1398 to 1400.
Trần Thuận Tông, (1378–1399), given name Trần Ngung, was the eleventh emperor of the Trần Dynasty who reigned Đại Việt from 1388 to 1398.
Remembering the success of Ngô Quyền who, half a century earlier, had defeated the Chinese navy as it attempted to invade Đại Việt by way of the Bạch Đằng River, he copied Quyen's strategy of booby-trapping the river with long sharpened stakes that were out of sight beneath the surface of the water at high tide.
A modern viewpoint is that the Chancellor morphs into a tiger (Thái sư hóa hổ) story in Ngô Sĩ Liên's work might be derived from the book Việt điện u linh (Compilation of the potent spirits in the Realm of Việt) of Lý Tế Xuyên; this hypothesis can explain the existence of such mythic elements in an official historical record for a dynasty like Đại Việt sử ký toàn thư.
In 1164, the relation between the Lý Dynasty and the Song Dynasty had a significant change when the Emperor Xiaozong of Song decided to acknowledge Đại Việt as a kingdom, the Kingdom of Annam (An Nam quốc), instead of only a district, the District of Giao Chỉ (Giao Chỉ quận) which was a designation made by his predecessors.
In 1258, Thái Tông decided to remarry Princess Chiêu Thánh to the general Lê Phụ Trần because he had an essential role in the victory of Đại Việt over the first Mongol invasion.
In the ensuing 40-day battle near modern-day Nanning, the Đại Việt troops were victorious, capturing the generals of three Song armies.
After a rapid advance in the territory of Đại Việt, the Song forces were stopped by the Lý defence line along the Như Nguyệt River led by Lý Thường Kiệt.
Borrowing a tactic used by general, later Emperor Ngô Quyền in 938 to defeat an invading Chinese fleet, the Đại Việt forces drove iron-tipped stakes into the bed of the Bạch Đằng River, and then, with a small flotilla, lured the Mongol fleet into the river just as the tide was starting to ebb.