Lý Thánh Tông
In 1061, the Man people on the southwest border harassed. Việt điện u linh tập history book, the story of Lý Thường Kiệt is written as follows: "in the Southwest, people rebelled against the colonies, the Man Lao people often harassed Vietnam land. Lý Thánh Tông saw that Thường Kiệt was diligent, careful, and lenient, so he sent him to be an envoy to investigate Thanh Hóa, Nghệ An, empower him to conveniently work. He cleverly appease the people, so all five provinces, six districts, three sources, and twenty-four caves were surrendered and lived in peace."