The Battle of Hamburger Hill (13–20 May 1969) was fought by US Army and Army of the Republic of Vietnam (ARVN) forces against People's Army of Vietnam (PAVN) forces during Operation Apache Snow of the Vietnam War. Though the heavily fortified Hill 937, a ridge of the mountain Dong Ap Bia in central Vietnam near its western border with Laos, had little strategic value, US command ordered its capture by a frontal assault, only to abandon it soon thereafter. The action caused a controversy among both the US armed services and the public back home, and marked a turning point in the U.S. involvement.
The battle was primarily an infantry engagement, with the US troops moving up the steeply sloped hill against well-entrenched troops. Attacks were repeatedly repelled by the PAVN defenses.