Lý Nhân Tông
In 1076, the Song formed an alliance with the other enemies of Dai Viet, Champa and the Khmer Empire and all three sent troops to invade Đại Việt. Emperor Lý Nhân Tông again sent General Lý Thường Kiệt to lead his forces. Being one of the many great military strategists of Vietnam, Lý Thường Kiệt placed spikes under the Như Nguyệt riverbed before tricking Song troops into the death trap, killing more than 1,000 Chinese soldiers and sailors and forcing their remaining forces to retreat.