Today in World War II History—July 24, 1944 POSTED: Wednesday, July 24, 2019 by Sarah Sundin US Marines landing on Tinian, 24 July 1944 (US Marine Corps) 75 Years Ago—July 24, 1944: Soviets liberate first Nazi German concentration camp, at Majdenek near Lublin, Poland. US Marines land on Tinian in the Marianas.