Battle of Cửa Việt was a battle in the Vietnam War, occurring between 25–31 January 1973 at the Cửa Việt naval base and its vicinity, in northeast Quảng Trị Province. The battle involved a combined task force of South Vietnamese Marine and armored units that tried to gain a foothold at the Cua Viet Port just as the ceasefire was about to take effect on January 28 in accordance with the Paris Peace Accords. The South Vietnamese forces were finally forced to retreat by a North Vietnamese counterattack with considerable losses on both sides.