During American involvement in World War II, April 29, 1942, Socony's unescorted tanker, named Mobiloil, was sunk by a German U-boat (German Type IX submarine U-108 captained by Klaus Schlotz), and all 52 people survived after 86 hours adrift in lifeboats. Socony-Mobil ranked 86th among United States corporations in the value of World War II military production contracts.[6]