The correct answer is: "The Battle of Okinawa".
The Battle of Okinawa was a major offensive took place in 1945 in the Pacific Theater during WWII. It started with the invasion of the island of Okinawa in April 1945. It was fought by the US Marine and armed forces against the Imperial Japanese Army. The aim of the allied forces was to control the island to subsequently use it as the base for a planned invasion to the Japanese Home Islands.