Re: U.S. Army involvement in the Pacific
All operations in the Philippine Islands were U.S. Army under the overall command of Gen. Douglas McArthur -- while the island-hopping (up until Iwo Jima) operations (under Admiral Nimitz) were Marine operations.
Operation Iceburg -- The invasion of Okinawa
This was a joint Army-Marine operation under the overall ground command of Army Lt. General Simon Buckner. Gen. Roy Geiger (USMC) took over command following Gen. Buckner's being killed. The large majority of troops were U.S. Army.
For the planned invasion of Japan commands were broken into two divisions:
(1) Admiral Nimitz (USN-USMC) would be in overall command of all troops (Including Army) during the actual invasions. Nimitz would remain in command until troops were ashore and Army headquarters were set up.
(2) General McArthur would then take over overall command of troops -- both Army AND Marines. McArthur's Sixth Army Commander General Walter Kreuger would be in direct command on the ground of the joint Army/Marine troops
The code name for the invasion(s) of Japanj was Operation Downfall.
This plan consisted of two phases-- Preliminary and follow-up:
(1) Operation Olympic -- The invasion of Kyushu, Japan. (2) Operation Coronet -- The Invasion of the Japanese Kanto Plain
Operation Olympic would be made up of four corps -- three Army and one Marine. Army troops would greatly outnumber Marines. Strength of the Sixth Army -- about 600,000 Army & Marines. ( Roughly half combat troops -- half support)
Operation Coronet would have also been a joint Army/Marine venture -- same as Olympic. Here again, the Army would have greatly outnumbered Marines. No proposed strength figures available.
In memory of Lt. Donald J. Jones. Shot down and killed over Oranienburg, Germany.
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