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