Central Office for South Vietnam (abbreviated COSVN ; ), officially known as the Central Executive Committee of the People's Revolutionary Party from 1962 until its dissolution in 1976, was the American term for the North Vietnamese political and military headquarters inside South Vietnam during the Vietnam War. It was envisaged as being in overall command of the communist effort in the southern half of the Republic of Vietnam (South Vietnam), which included the efforts of both People's Army of Vietnam (PAVN), the Viet Cong, and the People's Revolutionary Party. Some doubted its existence but in his memoirs the American commander in South Vietnam, General William Westmoreland, spoke of it as something whose existence and importance were not in doubt.