As a result, Iraq decided against continuing the war, choosing instead to make concessions to Tehran to end the Kurdish rebellion.[1][2] In the 1975 Algiers Agreement, Iraq made territorial concessions—including the Shatt al-Arab waterway—in exchange for normalised relations.[2] In return for Iraq recognising that the frontier on the waterway ran along the entire thalweg, Iran ended its support of Iraq's Kurdish guerrillas.[2]