Operation Olympic

Operation Downfall

A map outlining the Japanese and U.S. (but not other Allied) ground forces scheduled to take part in the battle for Japan. Two landings were planned:

Olympic—the invasion of the southern island, Kyūshū,
Coronet—the invasion of the main island, Honshu.

Date	1 November 1945–1947 (projected)
Location	Mainland Japan
Result	Cancelled after the unconditional Japanese surrender on August 15, 1945

Belligerents

United States

British Commonwealth

France

Imperial Japan

Commanders and leaders

Units involved

Ground units:

U.S. Army Forces, Pacific

(52–54 divisions in total)

Naval units:

United States Pacific Fleet

Air units:
USASTAF Pacific

Fifth Air Force
Seventh Air Force
Thirteenth Air Force
First Tactical Air Force

Tiger Force

Ground units:

First General Army

Second General Army

Patriotic Citizens' Fighting Corps

(66 divisions, 36 brigades, and 45 regiments, not counting PCFC units.)

Navy units:
Navy General Command

Combined Fleet
Naval Special Attack Forces

Air units:
Air General Army

First Air Army
Sixth Air Army

Third Air Fleet
Fifth Air Fleet
Tenth Air Fleet
Sixth Air Fleet

Twelfth Air Fleet

Strength

More than 5,000,000 (projected)
1,000,000 (projected)

~ 6,000,000 total (projected)

4,335,500 military,
31,550,000 civilian conscripts

35,885,500 total

A map outlining the Japanese and U.S. (but not other Allied) ground forces scheduled to take part in the battle for Japan. Two landings were planned:

United States

British Commonwealth

Ground units:

U.S. Army Forces, Pacific

(52–54 divisions in total)

Naval units:

United States Pacific Fleet

Air units:
USASTAF Pacific

Fifth Air Force
Seventh Air Force
Thirteenth Air Force
First Tactical Air Force

...
Wikipedia