This operation was successful due to the airstrikes of Operation Strangle (World War II). The ground assault of this operation came 6 weeks before the conflict where Dave Schreiner was mortally wounded.
The Battle of Okinawa (Japanese:  , Hepburn: Okinawa-sen ) (Okinawan:  , "Uchinaa ikusa " ), codenamed Operation Iceberg, was a major battle of the Pacific War fought on the island of Okinawa by United States Marine and Army forces against the Imperial Japanese Army and included the largest amphibious assault in the Pacific War during World War II, the April 1, 1945, invasion of Okinawa itself. 
Operation Diadem, also referred to as the Fourth Battle of Monte Cassino or, in Canada, the Battle of the Liri Valley, was an offensive operation undertaken by the Allies of World War II (U.S. Fifth Army and British Eighth Army in May 1944, as part of the Italian Campaign of World War II. 
 He was mortally wounded in action as a Marine on June 20, 1945 during the Battle of Okinawa and died the next day. 
 Although the initial goal of forcing the enemy to withdraw was not achieved, the air interdiction of Operation Strangle played a major role in the success of the subsequent ground assault Operation "Diadem". 
