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🔗============================ US Naval War with Japan Hub  ==========================🔗
Subpages:       US Submarine Force   Third & Fifth Fleets
Other Links   1941–42:    Pearl Harbor   Netherlands Indies Lost   Coral Sea   Midway   ​
                        1942–43:    Guadalcanal Naval War   ​New Georgia Naval War   Bougainville Naval War
                        1944–45:    Mariana Naval War   Leyte Gulf   
Philippines Naval War   Okinawa Naval War
​
Picture
Picture
USS Arizona - Destroyed at Pearl Harbor
USS Arizona, Pearl Harbor
WWII Hub
WWII Japan
 bigpigeon.us webpage WWII Japan > Naval War with Japan, © 2025 by Robert A. Christiansen​, updated by RAC 6 Jun 2025
Pearl Harbor, attacked by the Japanese on December 7, 1941, was headquarters of the US Navy's massive Pacific Fleet. The much-smaller US Asiatic Fleet was based at Cavite near Manila in the Philippine Islands. 

Japan in 1941 was a leading naval power, arguably third behind Great Britain and the United States. The Imperial Japanese Navy (IJN) was well-equipped and well-trained. However, as the war progressed and Japanese losses increased, Japan's relatively-small industrial base was unable to replace losses. By the time World War II entered its last phase, the IJN lay in ruins.

Links to Big Pigeon's WWII Japan > Naval War with Japan subpages:
  • US Submarine Force
  • Third & Fifth Fleets - the main battle component of the US Pacific Fleet.
Links to related webpages:
Japan Lashes Out > Pearl Harbor, 1941
Japan Lashes Out > The Netherlands Indies Lost
The Guadalcanal Naval War
The New Georgia Naval War
The Bougainville Naval War
The Battle of Leyte Gulf
The Philippines Naval War
The Naval Battle of Okinawa
Links to my reports:  ​
  • My chronological report WWII Maritime Losses - The Japanese War summarizes naval combat in the War with Japan and includes a list of all major American ship losses.
The Imperial Japanese Navy suffered especially grevious losses during the following battles and campaigns:
  • June '42 - the Battle of Midway - major Japanese losses.
  • Aug  '42 - Feb '43 - Solomon Islands sea battles associated with the land battle on Guadalcanal - major losses on both sides.
  • Jun '44 - Battle of the Philippine Sea - major Japanese losses.
  • Oct '44 - Battle of Leyte Gulf - major Japanese losses.
The United States also lost heavily during the naval war with Japan. However, the massive industrial base of the United States helped the US Navy grow dramatically during WWII despite its losses.  Major losses were:
  • Dec '41 - Surprise attack on Pearl Harbor.
  • Feb-Mar '42 - Dutch East Indies sea battles resulting in loss of much of the Allies' Asiatic fleets.
  • Aug '42 - Feb '43 - Guadalcanal sea battles.
  • Mar-Jun '45 - Kamikaze attacks off Okinawa.​
US Navy Growth During World War II
US Navy Growth During World War II
Slide Show - Selected Maps Showing World War II Maritime Conflict in the War With Japan
Sources for Big Pigeon's Naval War with Japan webpage:​
  • The page header image, USS Arizona - Pearl Harbor, is found at en.wikipedia.org.
  • US Navy Growth During World War II is courtesy of https://www.history.navy.mil/research/histories/ship-histories/us-ship-force-levels.html.
  • The Naval War in the Pacific map is courtesy of combinedfleet.com.
  • The Naval Battles in the Solomon Sea area map is courtesy of frisian.com.
  • The Iron Bound Sound map is courtesy of imhedrick.com.
  • The Battle of Leyte Gulf map is found at en.wikipedia.org​​
  • http://combinedfleet.com/battles/ - This excellent treatment summarizes in more detail the WWII naval war with Japan.

Pottawattamie Area WWII Dead US Navy Deaths in the War with Japan appear on the following webpages (current 2024):
  • US Submarine Services - 12 dead
  • Third & Fifth Fleets - 18 dead
  • Pearl Harbor - 5 dead
  • The Dutch Indies Lost - 6 dead
  • The Philippines Lost - 3 dead
  • The Battle of the Coral Sea - 3 dead
  • ​The Solomons Naval War - 21 dead
  • Guadalcanal - 1 dead
  • Alaska - 1 dead
  • Palau Islands - 2 dead
  • ​Pacific Base Areas - 8 dead
  • Battle of Leyte Gulf - 3 dead
  • Philippines Naval War - 4 dead
  • Naval Battle of Okinawa - 4 dead
Total Pottawattamie Area WWII Dead Naval Dead in the War with Japan: 91 (as of 18 Dec 2023)
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