In winter 1284, the King of Mongol-Yuan, Kublai Khan, sent 500.000 men led by the Crown Price Thoat Hoan (Toghan) to indave Dai Viet.

King Tran Nhan Tong ordered General Tran Quoc Tuan to command the Viets to quickly build a denfence line at Binh Lo River. The Mongol-Yuans attacked Binh Lo immediately and General Tran Quoc Tuan withdew his armies into Thang Long citadel.
In summer 1285, the enemy attacked Thang Long and Tran Quoc Tuan brought the two kings and their families to Thanh Hoa. Now the entire nation was threatened!
From the south, the Mongol-Yuan general Toa Do led his troops to fight general Tran Quang KHai in Tinh Gia district (morden-day Thanh Hoa province). From the north, the Crown Prince Thoat Hoan attacked Thanh Hoa from land at sea.
But the climatic conditions were unfavourable for the Mongols and many of the troops fell ill. Meanwhile, their food supply slowly dwindled. When General Toa Do led a hurried withdrawal of his troops along the coast to Thang Long, General Tran Quoc Tuan seized the moment to attack.
He sent two Vietnamese generals, Tran Nhat Duat and Tran Quoc Toan, and 10.000 men to fight Toa Do in Ham Tu Quan(morden-day Hung Yen province). Fearing a siege, Toa Do ordered his troops to leave the boats to the land.
The Viets arrows came down like rain. Toa Do was killed and his troops surrendered.
Tran Quoc Tuan then led the Viets attack Thang Long and Thoat Hoan was force to withdraw to his own country.
After the failure of 1285, Toghan asked his father, Kublai Khan, for a chance to attack the Viet again. In winter 1288, Toghan led 500.000 men on an invasion of Dai Viet. But General Tran Quoc Tuan commanded the Viets to defeat the enemy a second time and Thoat Hoan hurriedly withdrew from the country. Bach Dang River was coloured red with the invader’s blood. The Mongol-Yuan king was force to abandon any plans of fighting the Viets.
The reign of King Tran Nhan Tong lasted till 1293, when the king transfered the throne to his eldest son, the Crown prince Tran Thuyen who became King Tran Anh Tong.
In winter 1284, the King of Mongol-Yuan, Kublai Khan, sent 500.000 men led by the Crown Price Thoat Hoan (Toghan) to indave Dai Viet.
King Tran Nhan Tong ordered General Tran Quoc Tuan to command the Viets to quickly build a denfence line at Binh Lo River. The Mongol-Yuans attacked Binh Lo immediately and General Tran Quoc Tuan withdew his armies into Thang Long citadel.
In summer 1285, the enemy attacked Thang Long and Tran Quoc Tuan brought the two kings and their families to Thanh Hoa. Now the entire nation was threatened!
From the south, the Mongol-Yuan general Toa Do led his troops to fight general Tran Quang KHai in Tinh Gia district (morden-day Thanh Hoa province). From the north, the Crown Prince Thoat Hoan attacked Thanh Hoa from land at sea.
But the climatic conditions were unfavourable for the Mongols and many of the troops fell ill. Meanwhile, their food supply slowly dwindled. When General Toa Do led a hurried withdrawal of his troops along the coast to Thang Long, General Tran Quoc Tuan seized the moment to attack.
He sent two Vietnamese generals, Tran Nhat Duat and Tran Quoc Toan, and 10.000 men to fight Toa Do in Ham Tu Quan(morden-day Hung Yen province). Fearing a siege, Toa Do ordered his troops to leave the boats to the land.
The Viets arrows came down like rain. Toa Do was killed and his troops surrendered.
Tran Quoc Tuan then led the Viets attack Thang Long and Thoat Hoan was force to withdraw to his own country.
After the failure of 1285, Toghan asked his father, Kublai Khan, for a chance to attack the Viet again. In winter 1288, Toghan led 500.000 men on an invasion of Dai Viet. But General Tran Quoc Tuan commanded the Viets to defeat the enemy a second time and Thoat Hoan hurriedly withdrew from the country. Bach Dang River was coloured red with the invader’s blood. The Mongol-Yuan king was force to abandon any plans of fighting the Viets.
The reign of King Tran Nhan Tong lasted till 1293, when the king transfered the throne to his eldest son, the Crown prince Tran Thuyen who became King Tran Anh Tong.
