The Battle of Hamburger Hill was a military engagement that took place from May 10 to 20, 1969, during the Vietnam War. The battle occurred in the A Shau Valley of South Vietnam, near the border with Laos, and involved the US 101st Airborne Division and the North Vietnamese Army (NVA). The engagement centered on a heavily fortified NVA position on a hill known as Ap Bia Mountain, which was also referred to as "Hamburger Hill" due to its shape and the intense fighting that took place there. The US forces, led by the 3rd Battalion, 187th Infantry Regiment, launched a series of assaults on the hill, which was defended by a large and well-entrenched NVA force. The battle was marked by intense and prolonged fighting, with both sides suffering significant casualties. After 10 days of combat, the US forces finally secured the hill, but the battle was widely criticized for its high casualty rate and the perceived lack of strategic value in capturing the hill. The Battle of Hamburger Hill was one of the most publicized and controversial battles of the Vietnam War.