Code name in the context of "ECHELON"

A military operation (op) is the coordinated military actions of a state, or a non-state actor, in response to a developing situation. These actions are designed as a military plan to resolve the situation in the state or actor's favor. Operations may be of a combat or non-combat nature and may be referred to by a code name for the purpose of national security. Military operations are often known for their more generally accepted common usage names than their actual operational objectives. The operational level of war is between tactics and strategy.

The Tsar Bomba (code name: Ivan or Vanya, internal designation "AN602") was the most powerful nuclear weapon or weapon of any kind ever constructed and tested. A project of the Soviet Union, it was a thermonuclear aerial bomb, tested on 30 October 1961 at the Novaya Zemlya site in the country's far north. The bomb yielded 50 megatons of TNT.

The Soviet physicist Andrei Sakharov oversaw the project at Arzamas-16, while the main work of design was by Sakharov, Viktor Adamsky, Yuri Babayev, Yuri Smirnov [ru], and Yuri Trutnev. The project was ordered by First Secretary of the Communist Party Nikita Khrushchev in July 1961 as part of the Soviet resumption of nuclear testing after the Test Ban Moratorium, with the detonation timed to coincide with the 22nd Congress of the Communist Party of the Soviet Union (CPSU).

The Final Solution or the Final Solution to the Jewish Question was a plan orchestrated by Nazi Germany during World War II for the genocide of individuals they defined as Jews. The "Final Solution to the Jewish question" was the official code name for the murder of all Jews within reach, which was not restricted to the European continent. This policy of deliberate and systematic genocide starting across German-occupied Europe was formulated in procedural and geopolitical terms by Nazi leadership in January 1942 at the Wannsee Conference held near Berlin, and culminated in the Holocaust, which saw the murder of 90% of Polish Jews, and two-thirds of the Jewish population of Europe.

The nature and timing of the decisions that led to the Final Solution is an intensely researched and debated aspect of the Holocaust. The program evolved during the first 25 months of war leading to the attempt at "murdering every last Jew in the German grasp". Christopher Browning, a historian specializing in the Holocaust, wrote that most historians agree that the Final Solution cannot be attributed to a single decision made at one particular point in time. "It is generally accepted the decision-making process was prolonged and incremental." In 1940, following the Fall of France, Adolf Eichmann devised the Madagascar Plan to move Europe's Jewish population to the French colony, but the plan was abandoned for logistical reasons, mainly the Allied naval blockade. There were also preliminary plans to deport Jews to Palestine and Siberia. Raul Hilberg wrote that, in 1941, in the first phase of the mass-murder of Jews, the mobile killing units began to pursue their victims across occupied eastern territories; in the second phase, stretching across all of German-occupied Europe, the Jewish victims were sent on death trains to centralized extermination camps built for the purpose of systematic murder of Jews.

The battle of Raqqa, also known as the first battle of Raqqa and code named by rebels as the "Raid of the Almighty", was fought for control of the northern Syrian city of Raqqa during the Syrian civil war between Sunni Islamist rebel insurgents and the Syrian Arab Army. Rebel forces launched the offensive in early March 2013, and declared themselves in "near-total control" on 5 March, making it the first provincial capital claimed to come under rebel control in the civil war. The battle, on the opposition side, was primarily led by the al-Nusra Front and Ahrar al-Sham.

34°34′36.48″N 69°17′25.80″E / 34.5768000°N 69.2905000°E / 34.5768000; 69.2905000The Salt Pit and Cobalt were the code names of an isolated clandestine CIA black site prison and interrogation center outside Bagram Air Base in Afghanistan. It was located north of Kabul and was the location of a brick factory prior to the war in Afghanistan. The CIA adapted it for extrajudicial detention.

In the winter of 2005, the Salt Pit became known to the general public because of two incidents. In 2011, the Miami Herald indicated that the Salt Pit was the same facility that Guantanamo Bay detainees referred to as the dark prison—a fact subsequently confirmed in the CIA torture report.

Operation Slapstick was the code name for a British landing from the sea at the Italian port of Taranto during the Second World War. The operation, one of three landings during the Allied invasion of Italy in September 1943, was undertaken by airborne troops of the British 1st Airborne Division, commanded by Major-General George Hopkinson.

Planned at short notice, the mission followed an offer by the Italian government to open the ports of Taranto and Brindisi on the heel of Italy to the Allies. The airborne division was selected to undertake the mission, but at the time they were located in North Africa. A shortage of transport aircraft meant the division could not land in their traditional way by parachute and glider, and all the landing craft in the area were already allocated to the other landings: Operation Avalanche at Salerno on the western coast, and Operation Baytown at Calabria. Instead, the division had to be transported across the Mediterranean by ships of the Royal Navy. The landing was unopposed and the airborne division successfully captured the ports of Taranto, and later Brindisi on the Adriatic coast in working order.

The Entebbe raid, also known as the Operation Entebbe and officially codenamed Operation Thunderbolt (also retroactively codenamed Operation Yonatan), was a 1976 Israeli counter-terrorist mission in Uganda. It was launched in response to the hijacking of an international civilian passenger flight (an Airbus A300) operated by Air France between the cities of Tel Aviv and Paris. During a stopover in Athens, the aircraft was hijacked by two Palestinian PFLP–EO and two German RZ members, who diverted the flight to Libya and then to Uganda, where they landed at Entebbe International Airport to be joined by other terrorists. Once in Uganda, the group enjoyed support from Ugandan dictator Idi Amin.

A week earlier, on 27 June, an Air France Airbus A300 jet airliner with 248 passengers had been hijacked by two members of the Popular Front for the Liberation of Palestine – External Operations (PFLP-EO) under orders of Wadie Haddad (who had earlier broken away from the PFLP of George Habash), and two members of the German Revolutionary Cells. The hijackers took hostages with the stated objective of compelling the release of 40 Palestinian and affiliated militants imprisoned in Israel as well as the release of 13 prisoners in four other countries. Over 100 Ugandan soldiers were deployed to support the hijackers after the flight landed, and Amin, who had been informed of the hijacking from the beginning, had personally welcomed the terrorists at Entebbe. After moving all of the hostages to a defunct airport, the hijackers separated all Israelis and several non-Israeli Jews from the larger group of passengers, subsequently moving them into a separate room. Over the next two days, 148 non-Israeli hostages were released and flown out to Paris. The 94 remaining passengers, most of whom were Israelis, and the 12-member Air France crew continued to be held as hostages.

Ivy Mike was the codename given to the first full-scale test of a thermonuclear device, in which a significant fraction of the explosive yield comes from nuclear fusion.Ivy Mike was detonated on November 1, 1952, by the United States on the island of Elugelab in Enewetak Atoll, in the now independent island nation of the Marshall Islands, as part of Operation Ivy. It was the first full test of the Teller–Ulam design, a staged fusion device.

Due to its physical size and fusion fuel type (cryogenic liquid deuterium), the "Mike" device was not suitable for use as a deliverable weapon. It was intended as a "technically conservative" proof of concept experiment to validate the concepts used for multi-megaton detonations.