List of naval and land-based operations in the Pacific Theater during World War II

List of codenames of naval and land based operations in the Pacific Theater during World War II including Japan, Oceania, and the Pacific Rim.

Axis

A-Go (1944) — plan to engage and destroy the U.S. Fleet during the Saipan landings
AL (1942) — invasion of the western Aleutians as a diversion from the attempted invasion of Midway Island
- AOB (1942) — seizure of Kiska Island
- AQ (1942) — seizure of Attu Island
- Ke-Go (1943) — evacuation of Kiska, Aleutians
Nauru (1940) two German attacks on Nauru Island
- First Attack (1940) sinking of five British, Australian and Norwegian boats
- Second Attack (1940) bombardment of Nauru
I-Go (1943) — major air offensive to halt Allied advances on New Guinea and Guadalcanal
FS (1944) — proposal to isolate Australia by capturing New Caledonia, Samoa and Fiji
K-1 (1942) — reconnaissance and air-raid on Pearl Harbor
Ka (1942) — plan to destroy the U.S. Fleet and recapture Guadalcanal
Ke (1943) — evacuation of Guadalcanal
Ketsu-Go (Decisive) (1945) — plan to counter U.S.-led invasion of Japan
MI (1942) — attempted seizure of Midway Island
Mo (1942) — aborted invasion of Port Moresby in New Guinea
RE (1942) — attempt to take Allied airfields on Milne Bay in New Guinea
RO (1943) — reinforcement of air forces at Rabaul
Sho-Go (1945) — naval reaction to U.S. invasion of Leyte
SR (1942) — seizure of Lae and Salamaua in southeast New Guinea
TA (1944) — attempt to repulse U.S. beachhead on Bougainville Island
Tan No. 2 (1945) — long-range Kamikaze mission on Allied fleet anchorage at Ulithi atoll
TEN (1945) — air defense plan for Japan
Ten-Go (1945) — kikusui attacks and naval sortie to defend Okinawa.
Z (1941) — the Japanese attack on Pearl Harbor

Allies

Baus Au (1942) — plan to hide materiel in the Philippines before the fall for later use in guerilla warfare
Cartwheel (1943–1944) — Major offensives in the South West Pacific Area, aimed at isolating the major Japanese base at Rabaul
- Chronicle (1943) — landings at Woodlark Island and Kiriwina, New Guinea
- Toenails (1943) — landings at New Georgia
- Postern (1943) — assault on Lae, Papua New Guinea.
- Goodtime (1943) — New Zealand landing at Treasury Islands.
- Blissful (1943) — landing at Choiseul Island.
- Cherry Blossom (1943) — landing at Bougainville Island.
- Dexterity (1943–1944) — landings at Arawe, Cape Gloucester and Saidor and the capture of Tuvulu aerodrome, on New Britain
Causeway (planned for 1945, not executed) — planned invasion of Formosa (Taiwan); scrapped in favour of Operation Detachment
Cleanslate (1943) — landings on the Russell Islands
Cottage (1943) — operation to recapture Kiska in the Aleutians
Cyclone (1944) — airborne landings on Noemfoor, Dutch New Guinea
Detachment (1945) — invasion of Iwo Jima
Downfall (1945) — planned invasion of Japan
- Olympic (planned for 1945, not executed) — first of two prongs of the invasion of Japan
- Coronet (planned for 1946, not executed) — second of two prongs of the invasion of Japan
Fall River (1942) — reinforcement and airfield construction at Milne Bay, Papua New Guinea.
Ferdinand (1942) — coastwatchers on Japanese-occupied islands
Flintlock (1944) — assault on Marshall Islands.
- Catchpole (1944) — invasion of Eniwetok
- Hailstone (1944) — naval air attack on Truk
Forager (1944) — assault on Marianas Islands
Galvanic (1943) — assault on Gilbert Islands
Gratitude (1945) — US Navy raid into the South China Sea
Iceberg (1945) — invasion of Okinawa
Inmate (1945) — naval bombardment of Truk
Juneau (1945) — minesweeping operations at Okinawa.
Lentil (1945) — air attack on Pangkalan Brandan, eastern Sumatra
Majestic (planned for 1945, not executed) — planned Allied invasion of Kyushu. Scrapped in favor of Operation Olympic (under Operation Downfall)
Meridian (1945) — air attack on Palembang
Oboe (1945) — assault on Borneo
PM (1945) — removal of defensive minefield off Auckland, New Zealand
Sandcrab (1943) — operation to recapture Attu in the Aleutians
Starvation (1945) — aerial mining of Japanese ports and waterways
Stalemate (1944) — assault on Peleliu and Palau Islands
Vengeance (1943) — assassination of Japanese Admiral Isoroku Yamamoto
Watchtower (1942) — invasion of Guadalcanal