Trần Nhân Tông
Upon receiving news of the Mongol defeat, Kublai angrily banished Toghan to Yangzhou for life. The Mongols and the Vietnamese agreed to exchange their war prisoners. While the king Trần Nhân Tông was willing to pay tribute to the Yuan, relations again foundered on the question of attendance at the Yuan court and hostile relations continued. In 1289, King Nhân Tông agreed to sent back his prisoner Omar, but Prince Hưng Đạo who opposed this gesture, contrived have the ship transporting Omar sink at sea.