 Seeing the Mongols’ movement, Trần Hưng Đạo concluded that the Mongol army was weakened and decided to take the opportunity to strike, selecting battlefields where the Mongol cavalry could not be fully employed.The Cham were in pursuit of Sogetu as he was heading north, and killed him and defeated his army.However, according to Vietnamese history, Sogetu was defeated in Hàm Tử, Hưng Yên and was killed by the Vietnamese in his retreat.