The Urartu–Assyria War was a conflict between the Kingdom of Urartu and the Neo-Assyrian Empire. The war began around 714 BC, with the invasion of Urartu by the Assyrian King Sargon II. Sargon led multiple offensives deep into Urartian territory, amassing numerous victories in the war. Following his death, however, Urartian Kings Argishti II and Rusa II launched many successful counterattacks, reclaiming Urartu's lost territory and gaining some from Assyria. However, their successors suffered multiple major defeats, resulting in Urartu becoming an Assyrian client state.