All articles starting with O
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Operation Unthinkable
Operation Unthinkable: British Joint Planning Staff plan (report to Churchill, 22 May 1945, CAB 120/691) for a surprise Anglo-American attack on the USSR from 1 July 1945, judged near-infeasible against roughly three-to-one Soviet superiority in Central Europe.
Operation Uphold Democracy
Operation Uphold Democracy: the September 19, 1994 US-led intervention in Haiti under UNSCR 940 that restored Aristide peacefully after the Carter-Nunn-Powell deal, cost about $2 billion, and handed off to UNMIH in March 1995.
Operation Upshot–Knothole
Operation Upshot–Knothole was a 1953 series of 11 atmospheric nuclear tests at the Nevada Proving Ground, involving about 21,000 personnel and notable for heavy fallout, especially from the Harry shot.
Operation Uranus
Operation Uranus (Operatsiya Uran) was the codename for a Soviet strategic offensive in 1942 that encircled Axis forces at Stalingrad, specifically the German 6th Army and Romanian armies.
Operation Urban Warrior
Operation Urban Warrior, also called the Urban Warrior Advanced Warfighting Experiment, was a 1997-1999 Marine Corps Warfighting Laboratory urban warfare experimentation program culminating in March 1999 exercises in Oakland and Alameda, California, after San Francisco declined to host.
Operation Valentine (film)
Operation Valentine is a 2024 Telugu-Hindi bilingual aerial action drama directed by Shakti Pratap Singh Hada, starring Varun Tej and Manushi Chhillar as Indian Air Force officers; based on the 2019 Pulwama attack and Balakot airstrike, released 1 March 2024.
Operation Valkyrie
Operation Valkyrie, the July 20, 1944 plot: originally a Reserve Army contingency plan, secretly rewritten by Stauffenberg, Olbricht, and Tresckow into a coup after a bomb failed to kill Hitler at the Wolf's Lair.
Operation Varsity
Operation Varsity (24 March 1945): British 6th and U.S. 17th Airborne Divisions dropped east of the Rhine near Wesel, supporting Operation Plunder; the last major WWII airborne operation, largest single-day drop, costly but tactically successful.
Operation Vengeance
Operation Vengeance, the April 18, 1943 USAAF P-38 intercept that killed Admiral Isoroku Yamamoto, Combined Fleet commander and Pearl Harbor planner, over Bougainville after US codebreakers deciphered his itinerary, also known as the Yamamoto Mission.
Operation Vijiji
Operation Vijiji, also rendered Operation Vijijini, was Tanzania's compulsory campaign of 1973 to 1976 resettling millions of rural people into planned ujamaa villages under President Julius Nyerere.
Operation Vistula
Operation Vistula, Polish: Akcja "Wisła", was the 1947 deportation by Poland's communist authorities of about 140,000 Ukrainians and Lemkos to the Western and Northern Territories.
Operation Vulcan
Operation Vulcan, 22-28 April 1943, first stage of the final Allied offensive in Tunisia, British First Army and US II Corps attacks on the Axis bridgehead before Tunis and Bizerte; followed by Operation Strike and the Axis surrender on 13 May 1943.
Operation Warp Speed
Operation Warp Speed (OWS) was the 2020 U.S. HHS-DOD public-private program that funded six COVID-19 vaccine candidates with over $10 billion, achieving two EUAs at about 95% efficacy by December 2020; later renamed the Countermeasures Acceleration Group.
Operation Weiss
Operation Weiss (Fall Weiss, Case White), the Fourth Enemy Offensive, was a German-Italian-Croatian Axis offensive against Tito's Yugoslav Partisans, January-March 1943, in three phases ending at the Neretva river; the Partisans escaped encirclement.
Operation Weserübung
Operation Weserübung, roughly "Weser Exercise," was the German code name for the invasion and occupation of Norway and Denmark on 9 April 1940, launched to secure Scandinavian ore supplies.
Operation Wetback
Operation Wetback: 1954 INS mass deportation drive under Eisenhower, run by General Joseph Swing with Attorney General Brownell's plans, deporting over a million Mexicans while the Bracero guest-worker program expanded.
Operation Wetie
Operation Wetie was the wave of political violence in Nigeria's Western Region between October 1965 and January 1966 after a rigged election, in which opponents were doused in petrol and set alight.
Operation Wikinger
Operation Wikinger, meaning "Viking", was a February 1940 sortie by six German destroyers into the North Sea that ended with two sunk by friendly fire and mines, killing 578.
Operation Winter Storm
Operation Winter Storm (Unternehmen Wintergewitter), Manstein's 12–23 December 1942 German relief offensive from Kotelnikovo to break the Soviet encirclement of Sixth Army at Stalingrad; halted 30–35 miles short by the 51st and 2nd Guards Armies and Little Saturn.
Operation Y and Shurik's Other Adventures (Операция «Ы» и другие приключения Шурика)
Operation Y and Shurik's Other Adventures, or Операция «Ы» и другие приключения Шурика, is a 1965 Soviet slapstick comedy directed by Leonid Gaidai, starring student Shurik across three novellas.
Operation Yellow Ribbon
Operation Yellow Ribbon (French: Opération ruban jaune) was launched by Transport Canada on September 11, 2001, landing 224 diverted flights with more than 33,000 passengers at Canadian airports.
Operation Yewtree
Operation Yewtree was a Metropolitan Police investigation into historical sexual abuse by Jimmy Savile and others, launched in October 2012 after an ITV documentary aired abuse allegations.
Operation Yukthiya
Operation Yukthiya (Sinhala for 'justice') is Sri Lanka's anti-drug crackdown launched 17 December 2023 by Acting IGP Deshabandu Tennekoon and Minister Tiran Alles, with over 100,000 arrests by May 2024 and UN-documented torture and arbitrary detention allegations.
Operation Zarb-e-Azb
Operation Zarb-e-Azb, also known as the North Waziristan offensive, was a joint Pakistan Armed Forces operation launched on 15 June 2014 against militants in North Waziristan.
Operation: Doomsday
Operation: Doomsday is MF DOOM's 1999 debut solo album on Fondle 'Em Records, introducing his masked persona after K.M.D.; reissued 2001 (Sub Verse) and 2011 (Metalface, 42 tracks).
Operation: Mindcrime
Operation: Mindcrime is Queensrÿche's 1988 EMI concept album about the assassin Nikki and Dr. X; a million-selling US breakthrough, widely called a defining progressive metal record, later followed by sequels II (2006) and III (2026).
Operational amplifier
An operational amplifier, or op-amp, is a high-gain voltage amplifier with a differential input and single-ended output, first developed at Bell Labs in the 1940s.
Operational amplifier applications
Operational amplifier applications, also called op-amp circuits, are analog circuits built around a high-gain differential amplifier whose external feedback networks set functions like amplification, arithmetic, filtering, and oscillation.
Operational analytics
Operational analytics (also operational BI, operational intelligence) applies analytics directly to operational systems like POS, ERP, IoT, and CRM in near real time to monitor, optimize, and automate day-to-day business processes.
Operational Camouflage Pattern
Operational Camouflage Pattern (OCP), also called Scorpion W2, is the U.S. Army's base combat uniform camouflage, selected July 31, 2014 to replace UCP; a seven-color pattern also worn by the Air Force.