During the Dachau liberation reprisals, German SS troops were killed by U.S. soldiers and concentration camp internees at the Dachau concentration camp on April 29, 1945, during World War II. It is unclear how many SS men were killed in the incident, but most estimates place the number killed at around 35–50. In the days before the camp's liberation, SS guards at the camp had forced 7,000 inmates on a death march that resulted in the death of many from exposure and shooting. When Allied soldiers liberated Dachau, they were variously shocked, horrified, disturbed, and angered at finding the massed corpses of internees, and by the combativeness of some of the remaining guards who allegedly fired on them. Discoveries On April 29, 1945, soldiers of the 3rd Battalion, 157th Infantry Regiment, 45th Infantry Division, commanded by Lieutenant Colonel Felix L. Sparks, approaching the sprawling Dachau complex from the southwest, found 39 railway boxcars containing some 2,000 skeletal corpses parked on rail tracks just outside the complex itself. Brain tissue was splattered on the ground from one victim found nearby with a crushed skull. The smell of decaying bodies and human excrement, and the sight of naked, emaciated bodies induced vomiting, crying, disbelief, and rage in the advancing troops. Advancing soldiers from H Company, 22nd Regiment used a loudspeaker to call on the SS to surrender, but they continued to fire in bursts. Upon moving deeper into the complex, and the prisoner area itself, the soldiers found more bodies. Some had been dead for hours or days before the camp's capture and lay where they had died. Soldiers reported seeing a row of concrete structures that contained rooms full of hundreds of naked and barely clothed dead bodies piled floor to ceiling, a coal-fired crematorium, and a gas chamber. "The stench of death was overpowering," Sparks recalled. Surrender According to Harold Marcuse, American professor of German history, camp commander SS-Hauptsturmführer Martin Weiss, together with the camp guards and the SS garrisons, had fled the camp before the arrival of U.S. troops. SS-Untersturmführer Heinrich Wicker (murdered after the surrender) was left in charge and had roughly 560 personnel at his disposal; these came from conscripted inmates of the SS disciplinary prison inside the Dachau concentration camp and Hungarian Waffen-SS troops. On April 29, Dachau was surrendered to Brigadier General Henning Linden of the 42nd Infantry Division of the U.S. Army by Untersturmführer