On 8 May 1944, Höss returned to Auschwitz to supervise operation "Aktion Höss." In "Aktion Höss," 430,000 Hungarian Jews were sent to Auschwitz and killed in 56 days. Even the huge facility that Höss had built could not handle the huge number of victims' corpses. The camp's staff had to burn thousands of bodies in open fire pits.