All articles starting with O
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Operation Gordian Knot
Operation Gordian Knot (Operação Nó Górdio) was a 1970 Portuguese military offensive during the Mozambican War of Independence, the largest Portuguese campaign of the colonial wars.
Operation Gothic Serpent
Operation Gothic Serpent, also known as the Black Hawk Down operation, was the 1993 U.S. Task Force Ranger campaign in Mogadishu, Somalia, to capture warlord Mohamed Farrah Aidid; its October 3 raid became the Battle of Mogadishu.
Operation Grapple
Operation Grapple was a series of nine British nuclear weapons tests in 1957 and 1958 at Malden and Christmas Islands in the Pacific, proving Britain's hydrogen bomb.
Operation Green Sea
Operation Green Sea (Portuguese: Operação Mar Verde) was an amphibious attack on Conakry, Guinea, by some 400 Portuguese soldiers on 22 November 1970, during the Guinea-Bissau War of Independence.
Operation Greenhouse
Operation Greenhouse: fourth U.S. postwar atmospheric nuclear test series, four tower shots (Dog, Easy, George, Item) at Enewetak Atoll, April-May 1951, yields 45.5-225 kt; George and Item advanced thermonuclear weapon development.
Operation Greif
Operation Greif (Unternehmen Greif) was Otto Skorzeny's German commando operation in the 1944 Battle of the Bulge, using English-speaking troops in US uniforms to seize Meuse bridges and sow confusion; it failed its main objective but spread panic, and Skorzeny was acquitted at Dachau in 1947.
Operation Hadal (蛟龙行动)
Operation Hadal (蛟龙行动, also 红海行动2) is a 2025 Chinese military action film by Dante Lam and Bona Film Group, China's first nuclear-submarine war film, released January 29, 2025, grossing about 393 million yuan before withdrawal and an August 2025 Special Edition re-release.
Operation Hailstone
Operation Hailstone, or the Battle of Truk, was a two-day US Navy carrier attack on Truk Lagoon in February 1944 that wrecked Japan's major Central Pacific base.
Operation Halyard
Operation Halyard, also known as the Halyard Mission (Serbian: Операција Ваздушни мост), was an OSS airlift that rescued downed Allied airmen from occupied Serbia in 1944.
Operation Hammer (1987)
Operation Hammer was a Los Angeles Police Department anti-gang sweep program begun in 1987 under Chief Daryl Gates, producing over 50,000 mass arrests of mostly Black and Latino residents in South Los Angeles, with few charges filed and major civil-liberties criticism.
Operation Hannibal
Operation Hannibal (Unternehmen Hannibal) was the German navy's 1945 evacuation of East Prussia by sea, called the largest naval evacuation in history, costing over 20,000 lives.
Operation Hardtack I
Operation Hardtack I was a series of 35 United States nuclear tests at Enewetak, Bikini, and Johnston Island in 1958, totaling 35.6 megatons, the largest US test series to that date.
Operation Hastings
Operation Hastings was a July 1966 joint US Marine and South Vietnamese operation in Quang Tri Province, South Vietnam, against the North Vietnamese 324B Division.
Operation Herrick
Operation Herrick was the UK codename for military operations in Afghanistan from 2003 to the end of 2014 under ISAF, spanning twenty six-month rotations, peaking at 9,500 personnel, centered on Helmand, with 457 UK deaths and £27.7 billion cost.
Operation Highjump
Operation Highjump (officially the U.S. Navy Antarctic Developments Program, 1946-47), Task Force 68 under Byrd and Cruzen: 4,700 men, 13 ships, aerial photomapping of Antarctica, Little America IV, early withdrawal from Ross Sea pack ice.
Operation Homecoming
Operation Homecoming was the United States military program that returned 591 American prisoners of war from Vietnam, Laos, and China in 1973, after the Paris Peace Accords, through Clark Air Base in the Philippines.
Operation Hope Not
Operation Hope Not was the British government code name for the state funeral plan of Sir Winston Churchill, begun by Queen Elizabeth II's direction in 1953 after Churchill's stroke, chaired by the Duke of Norfolk, and executed at his 30 January 1965 funeral.
Operation IceBridge
Operation IceBridge was a NASA airborne science campaign, flown from 2009 to 2021, that measured changes in the thickness of Arctic and Antarctic ice between the ICESat satellites.
Operation Ichi-Go (一号作戦)
Operation Ichi-Go (一号作戦), the Battle of Henan-Hunan-Guangxi, was Japan's biggest campaign of the war: about 500,000 troops fought across China from April 1944, winning ground but changing little.
Operation Igloo White
Operation Igloo White was a U.S. Air Force electronic surveillance system in Laos from late 1967. It used air-dropped sensors and orbiting aircraft to detect North Vietnamese movements.
Operation Inherent Resolve
Operation Inherent Resolve (OIR), CJTF-OIR, is the U.S.-led military operation against ISIS in Iraq and Syria, launched August 8, 2014 and named October 15, 2014. It defeated the ISIS caliphate territorially by 2019, shifted to advise-and-enable, and ended its Iraq phase September 30, 2026.
Operation Ivory Coast
Operation Ivory Coast was a 1970 US special operations raid to rescue American POWs from the Son Tay prison camp near Hanoi, North Vietnam; the camp was empty.
Operation Ivy (band)
Operation Ivy: Berkeley, California ska-punk band (1987–1989) with Jesse Michaels, Tim Armstrong, Matt Freeman, Dave Mello; released Hectic EP and Energy on Lookout Records; forerunner of Rancid.
Operation Java
Operation Java (ഓപ്പറേഷൻ ജാവ) is a 2021 Malayalam cybercrime investigation film, Tharun Moorthy's directorial debut, starring Balu Varghese and Lukman as unemployed BTech graduates aiding the Kochi cyber cell; it ran 75 days and was 2021's first Malayalam hit.
Operation Jayawijaya
Operation Jayawijaya (Operasi Jayawijaya) was Indonesia's planned 1962 large-scale open attack to take West Irian from the Netherlands, with about 70,000 troops landing at Biak. It was postponed in August 1962 and never carried out.
Operation Jericho
Operation Jericho, wartime designation Ramrod 564, was a low-level RAF bombing raid on 18 February 1944 that breached the walls of Amiens prison in occupied France.
Operation Jumelles
Operation Jumelles, French for "Binoculars," was a large French military offensive of the Algerian War, launched in Grande Kabylie on 22 July 1959 and fought until early 1960.
Operation Junction City
Operation Junction City was a large US and South Vietnamese search and destroy operation in War Zone C, Vietnam, in 1967, targeting the communist COSVN headquarters.
Operation Ke
Operation Ke (ケ号作戦) was the Japanese operation to evacuate its forces from Guadalcanal, completed by navy destroyers in three runs on 1, 4, and 7 February 1943, unseen by the Allies.
Operation Kikusui
Operation Kikusui (菊水作戦, "floating chrysanthemums") was the Japanese Navy's designation for ten massed kamikaze attacks launched against the Allied fleet off Okinawa between April and June 1945.