The defeat of South Vietnam was arguably America’s worst foreign policy disaster of the 20th Century. Yet a complete understanding of the endgame—from the 27 January 1973 signing of the Paris Peace Accords to South Vietnam’s surrender on 30 April 1975—has eluded us.Black April addresses that deficit. A culmination of exhaustive research in three distinct areas: primary source documents from American archives, North Vietnamese publications containing primary...