Battle of Hamburger Hill the steeply-sloped hill against well entrenched troops. Attacks were repeatedly repelled by the PAVN defenses. Bad weather also hindered operations. Nevertheless, the Airborne troops took the hill through direct assault, causing extensive casualties to the PAVN forces. The battle took place on Dong Ap Bia (Ap Bia Mountain, ) in the rugged, jungle-shrouded mountains of South Vietnam, from the Laotian border. Rising from the floor of the western A Sầu Valley, Ap Bia Mountain is a solitary massif, unconnected to the ridges of the surrounding Annamite range. It dominates the northern valley, towering some above sea level. Snaking down from
Battle of Hamburger Hill casualties, including all of its officers. The battle was one of close combat, with the two sides exchanging small arms and grenade fire within of one another. From a light observation helicopter, the battalion commander attempted to coordinate the movements of the other companies into a final assault, but an exceptionally intense thunderstorm reduced visibility to zero and ended the fighting. Unable to advance, 3/187th again withdrew down the mountain. The three converging companies of 1/506th struggled to take Hill 900, the southern crest of the mountain, encountering heavy opposition for the first time in the battle. Because of the