After numerous attacks and raids by the combined forces of Baekje and Goguryeo, King Muyeol sought help from Emperor Gaozong of Tang to defend his exhausted kingdom against the attacks, in return for potential territorial gains.
Efter mange angreb og angreb af de kombinerede kræfter i Baekje og Goguryeo søgte kong Muyeol hjælp fra kejser Gaozong af Tang for at forsvare sit udmattede kongerige mod angrebene i modsætning til potentielle territoriale gevinster.