Lý Thần Tông was crowned under the supervision of Lê Bá Ngọc, a powerful eunuch. Lê Bá Ngọc adopted a son of the emperor’s mother named Đỗ Anh Vũ. During the reign of Lý Thần Tông, Suryavarman II of the Khmer Empire launched an attack on Đại Việt’s southern territories in 1128. In 1132 he allied with Cham king Jaya Indravarman III and briefly seized Nghệ An and pillaged Thanh Hoá. In 1135 Duke Đỗ Anh Vũ raised an army and repelled the Khmer invaders. After the Chams refused to support in 1137, Suryavarman II abandoned his incursions on Đại Việt and launched the invasion of Champa. At the same time, Lý Thần Tông began suffering a fatal illness, according to an inscription, and he died in the next year, leaving the infant Lý Thiên Tộ who became Emperor Lý Anh Tông (r. 1138–1175) under Đỗ Anh Vũ’s patronage. After Đõ Anh Vũ died in 1159, another powerful figure named Tô Hiến Thành stepped into the role of guarding the dynasty until 1179. In 1149, Javanese and Siamese ships arrived Vân Đồn to trade. The sixth son of Lý Anh Tông, Prince Lý Long Trát was crowned in 1175 as Lý Cao Tông (r. 1175–1210).