The Line of Actual Control (LAC) is a notional demarcation line that separates Indian-controlled territory from Chinese-controlled territory in the Sino-Indian border dispute. The term is said to have been used by Zhou Enlai in a 1959 letter to Jawaharlal Nehru. It subsequently referred to the line formed after the 1962 Sino-Indian War and is part of the Sino-Indian border dispute.