Editing Operation Downfall (section)

===Redeployment===
{{See also|Operation Downfall order of battle}}
Olympic was to be mounted with resources already present in the Pacific, including the [[British Pacific Fleet]], a [[Commonwealth of Nations|Commonwealth]] formation that included at least eighteen aircraft carriers (providing 25% of the Allied air power) and four battleships.

Tiger Force, a joint Commonwealth long-range [[heavy bomber]] unit, was to be transferred from [[Royal Air Force|RAF]], [[Royal Australian Air Force|RAAF]], [[Royal Canadian Air Force|RCAF]] and [[Royal New Zealand Air Force|RNZAF]] units and personnel serving with [[RAF Bomber Command]] in Europe. In 1944, early planning proposed a force of 500–1,000 aircraft, including units dedicated to [[aerial refueling]]. Planning was later scaled back to 22 squadrons and, by the time the war ended, to 10 squadrons: between 120 and 150 [[Avro Lancaster]]s/[[Avro Lincoln|Lincolns]], operating out of airbases on Okinawa. Tiger Force was to have included the elite [[No. 617 Squadron RAF|617 Squadron]], also known as "The Dambusters", which carried out specialist bombing operations.

Initially, US planners also did not plan to use any non-US Allied ground forces in Operation Downfall. Had reinforcements been needed at an early stage of Olympic, they would have been diverted from US forces being assembled for Coronet—for which there was to be a massive redeployment of units from the US Army's [[South West Pacific Area (command)|Southwest Pacific]], [[China Burma India Theater|China-Burma-India]] and [[European Theater of Operations, United States Army|European]] commands, among others. These would have included spearheads of the war in Europe such as the [[US First Army]] (15 divisions) and the Eighth Air Force. These redeployments would have been complicated by the simultaneous demobilization and replacement of highly experienced, time-served personnel, which would have drastically reduced the combat effectiveness of many units.{{citation needed|date=October 2009}}

U.S. commanders rejected the Australian government’s early request for inclusion of an [[Australian Army]] infantry division in the first wave (Olympic).{{sfn|Day|p = 297}} Not even the initial plans for Coronet envisaged landing units from Commonwealth or other Allied armies on the Kantō Plain in 1946.{{sfn|Skates|p= 229}} The first official "plans indicated that assault, followup, and reserve units would all come from US forces".{{sfn|Skates|p= 229}}
By mid-1945—when plans for Coronet were being reworked—many other Allied countries had "offered ground forces, and a debate developed" amongst Western Allied political and military leaders, "over the size, mission, equipment, and support of these contingents".{{sfn|Skates|p= 229}} Following negotiations, it was decided that Coronet would include a joint [[Commonwealth Corps]], made up of infantry divisions from the Australian, [[New Zealand Army|New Zealand]], [[British Army|British]] and [[Canadian Army|Canadian]] armies. Reinforcements would have been available from those countries, as well as other parts of the Commonwealth. However, MacArthur blocked proposals to include an [[British Indian Army|Indian Army]] division because of differences in language, organization, composition, equipment, training and doctrine.{{sfn |Day| p=299}}{{Sfn | Skates| p=230}} He also recommended that the corps be organized along the lines of a U.S. corps, should use only U.S. equipment and logistics, and should train in the U.S. for six months before deployment; these suggestions were accepted.{{sfn|Day|p=299}} 

The British Government suggested that: Lieutenant-General Sir [[Charles Keightley]] should command the Commonwealth Corps, a combined Commonwealth fleet should be led by Vice-Admiral Sir [[William Tennant (Royal Navy officer)|William Tennant]], and that—as Commonwealth air units would be dominated by the RAAF – the Air Officer Commanding should be Australian.<ref>Gavin Long, 1963, Official Histories. ''Australia in the War of 1939–1945''. Series 1 – Army, Volume VII – The Final Campaigns, 1st ed., Canberra, Australian War Memorial p. 549.</ref> However, the Australian government questioned the appointment of Keightley, an officer with no experience in fighting the Japanese. [[Frederick Shedden]] suggested that Lieutenant General [[Leslie Morshead]], an Australian who had been carrying out the [[New Guinea campaign|New Guinea]] and [[Borneo campaign (1945)|Borneo campaigns]], should be appointed. The war ended before the details of the corps were finalized.{{sfn|Horner|p=418}}