in all, the US Army had over 103,000 soldiers (of these, 38,000+ were non-divisional artillery, combat support and HQ troops, with another 9,000 service troops), over 88,000 Marines and 18,000 Navy personnel (mostly Seabees and medical personnel). At the start of the Battle of Okinawa, the US 10th Army had 182,821 personnel under its command. It was planned that General Buckner would report to Turner until the amphibious phase was completed, after which he would report directly to Spruance. Total aircraft in the American Navy, Marine, and Army Air Force exceeded 3000 over the course of the battle, including fighters, attack aircraft, scout planes, bombers and dive-bombers. The invasion was supported by a fleet consisting of 18 battleships, 27 cruisers, 177 destroyers/destroyer escorts, 39 aircraft carriers (11 fleet carriers, 6 light carriers and 22 escort carriers) and various support and troop transport ships.
The British naval contingent accompanied 251 British naval aircraft, and included a British Commonwealth fleet with Australian, New Zealand and Canadian ships and personnel.