Okinawa was key island and had to be taken as it would be the springboard form an invasion of the Japanese Home Islands. It was heavily defended and the Japanese commander decided on anew defensive tactic: Concede the landings and draw the U.S. forces in beyond the reach of naval gunfire support. The 154,000 man landing force (Marines and Army) struck on April 1, 1945. It was the largest amphibious landing of the Pacific theater with the largest casualties: Over 100,000 Japanese and 50,000 American. The American Navy suffered the greatest losses in a single battle at Okinawa as there were over 23000 Kamikaze attacks on the 5th fleet supporting the landings. 34 ships were sunk and 68 damaged. The battle of Hacksaw Ridge took place on Okinawa. The battle raged into June with resistance ending on the 21st and on June 22nd, the final official American flag raising ceremony on a Pacific battlefield took place. This was the final great battle of World War II.