U.S. attack on Rhenania Ossag Oil Refinery.

U.S. attack on Rhenania Ossag Oil Refinery. Black smoke spouts thousands of feet into the air above the Nazi oil refineries at Rhenania Ossag, Hamburg, as Eighth U.S. Air Force heavy bombers attack June 20, 1944. Other targets coved by the U.S. raiders on the same day, when they struck the heaviest blow of the war against German oil production, were other synthetic oil plants at Misburg, Magdeburg and Ostermoor.