John Wayne finally won his sole acting Oscar in 1970, but he arguably should have gotten it 20 years earlier for his greatest war movie, Sands of Iwo Jima. The 1949 film is a gritty and intensely moving portrayal of Sgt. John Stryker's U.S. Marines platoon fighting Japanese forces on the Pacific Front of World War II, culminating in the Battle of Iwo Jima. This event is known for its tens of thousands of casualties, and Sands of Iwo Jima inevitably ends with a bittersweet moment of tragedy that makes it an even more powerful rendering of the historic conflict.