The North Atlantic Treaty Organization, also called the North Atlantic Alliance, is an intergovernmental military alliance of 32 member states – 30 European and two North American. Established in the aftermath of World War II, the organization implements the North Atlantic Treaty, signed in Washington, D.C., on 4 April 1949. NATO is a collective security system: its independent member states agree to defend each other against attacks by third parties. During the Cold War, NATO operated as a check on the threat posed by the Soviet Union. The alliance remained in place after the dissolution of the Soviet Union and the Warsaw Pact and has been involved in military operations in the Balkans, the Middle East, South Asia, and Africa. The organization's motto is animus in consulendo liber. The organization's strategic concepts include deterrence.
The Implementation Force (IFOR) was a NATO-led multinational peace enforcement force in Bosnia and Herzegovina under a one-year mandate from 20 December 1995 to 20 December 1996 under the codename Operation Joint Endeavour.
A no-fly zone, also known as a no-flight zone (NFZ), or air exclusion zone (AEZ), is a territory or area established by a military power over which certain aircraft are not permitted to fly. Such zones are usually set up in an enemy power's territory during a conflict for humanitarian or military reasons without consent of the enemy state, similar in concept to an aerial demilitarized zone, and usually intend to prohibit the enemy's military aircraft from operating in the region. Military action is employed by the enforcing state and, depending on the terms of the NFZ, may include preemptive attacks to prevent potential violations, reactive force targeted at violating aircraft, or surveillance with no use of force. Air exclusion zones and anti-aircraft defences are sometimes set up in a civilian context, for example to protect sensitive locations, or events such as the 2012 London Olympic Games, against terrorist air attack. A no-fly zone is generally not considered a form of aerial blockade due to its more limited scope compared to an aerial blockade.
The United Nations Protection Force was the first United Nations peacekeeping force in Croatia and in Bosnia and Herzegovina during the Yugoslav Wars. The force was formed in February 1992 and its mandate ended in March 1995, with the peacekeeping mission restructuring into three other forces.
This timeline of United States government military operations, based in part on reports by the Congressional Research Service, shows the years and places in which U.S. military units participated in armed conflicts or occupation of foreign territories. Items in bold are wars most often considered to be major conflicts by historians and the general public.
Air interdiction (AI), also known as deep air support (DAS), is the use of preventive tactical bombing and strafing by combat aircraft against enemy targets that are not an immediate threat, to delay, disrupt or hinder later enemy engagement of friendly forces. It is a core capability of virtually all military air forces, and has been conducted in conflicts since World War I. Aircraft that are used for this purpose are known as interdictors.
Operation Deliberate Force was a sustained air campaign conducted by the North Atlantic Treaty Organization (NATO), in concert with the United Nations Protection Force (UNPROFOR) ground operations, to undermine the military capability of the Army of Republika Srpska (VRS), which had threatened and attacked UN-designated "safe areas" in Bosnia and Herzegovina during the Bosnian War with the Srebrenica genocide and Markale massacres, precipitating the intervention. The shelling of the Sarajevo marketplace on 28 August 1995 by the VRS is considered to be the immediate instigating factor behind NATO's decision to launch the operation.
Operation Deny Flight was a North Atlantic Treaty Organization (NATO) operation that began on 12 April 1993 as the enforcement of a United Nations (UN) no-fly zone over Bosnia and Herzegovina. The United Nations and NATO later expanded the mission of the operation to include providing close air support for UN troops in Bosnia and carrying out coercive air strikes against targets in Bosnia. Twelve NATO members contributed forces to the operation and, by its end on 20 December 1995, NATO pilots had flown 100,420 sorties.
Operation Mistral 2, officially codenamed Operation Maestral 2, was a Croatian Army (HV) and Croatian Defence Council (HVO) offensive in western Bosnia and Herzegovina on 8–15 September 1995 as part of the Bosnian War. Its objective was to create a security buffer between Croatia and positions held by the Bosnian Serb Army of Republika Srpska (VRS). The operation also spearheaded a Herzeg-Croat led move to compromise the occupation of the largest Bosnian Serb-held city, Banja Luka, by capturing the towns of Jajce, Šipovo and Drvar. Thus jeopardizing the operations capacity of Banja Luka and ultimately leading to its recapture. The combined HV and HVO forces were under the overall command of HV Major General Ante Gotovina.
The United States government has been involved in numerous interventions in foreign countries throughout its history. The U.S. has engaged in nearly 400 military interventions between 1776 and 2023, with half of these operations occurring since 1950 and over 25% occurring in the post-Cold War period. Common objectives of U.S. foreign interventions have revolved around economic opportunity, social protection, protection of U.S. citizens and diplomats, territorial expansion, fomenting regime change, nation-building, and enforcing international law.
The NATO intervention in Bosnia and Herzegovina was a series of actions undertaken by NATO whose stated aim was to establish long-term peace during and after the Bosnian War. NATO's intervention began as largely political and symbolic, but gradually expanded to include large-scale air operations and the deployment of approximately 60,000 soldiers of the Implementation Force.
On 19 March 2011, a multi-state NATO-led coalition began a military intervention in Libya to implement United Nations Security Council Resolution 1973, in response to events during the First Libyan Civil War. With ten votes in favour and five abstentions, the intent of the UN Security Council was to have "an immediate ceasefire in Libya, including an end to the current attacks against civilians, which it said might constitute 'crimes against humanity' ... [imposing] a ban on all flights in the country's airspace — a no-fly zone — and tightened sanctions on the Muammar Gaddafi regime and its supporters."
Beginning on March 19, 2011, and continuing through the 2011 military intervention in Libya, anti-war protests against military intervention in Libya were held in many cities worldwide.
The international reactions to the 2011 military intervention in Libya were the responses to the military intervention in Libya by NATO and allied forces to impose a no-fly zone. The intervention was authorized by United Nations Security Council Resolution 1973, approved in New York on 17 March, in response to the Libyan Civil War, though some governments allege participants in the operation exceeded their mandate.
The United Kingdom began a military intervention in Sierra Leone on 7 May 2000 under the codename Operation Palliser. Although small numbers of British personnel had been deployed previously, Palliser was the first large-scale intervention by British forces in the Sierra Leone Civil War. In early May 2000, the Revolutionary United Front (RUF)—one of the main parties to the civil war—advanced on the country's capital, Freetown, prompting the British government to dispatch an "Operational Reconnaissance and Liaison Team" (ORLT) to prepare to evacuate foreign citizens. On 6 May, the RUF blocked the road connecting Freetown to the country's main airport, Lungi. The next day, British soldiers began to secure the airport and other areas essential to an evacuation. The majority of those who wished to leave were evacuated within the first two days of the operation, but many chose to stay following the arrival of British forces.
The Battle of Vrbanja Bridge was an armed confrontation which took place on 27 May 1995, between United Nations (UN) peacekeepers from the French Army and elements of the Bosnian Serb Army of Republika Srpska (VRS). The fighting occurred at the Vrbanja Bridge crossing of the Miljacka river in Sarajevo, Bosnia and Herzegovina, during the Bosnian War. The VRS seized the French-manned United Nations Protection Force (UNPROFOR) observation posts on both ends of the bridge, taking hostage 12 French peacekeepers. Ten were taken away, and two were kept at the bridge as human shields.
The Split Agreement or Split Declaration was a mutual defence agreement between Croatia, the Republic of Bosnia and Herzegovina and the Federation of Bosnia and Herzegovina, signed in Split, Croatia on 22 July 1995. It called on the Croatian Army (HV) to intervene militarily in Bosnia and Herzegovina, primarily in relieving the siege of Bihać.
On 15 June 2014, U.S. President Barack Obama ordered United States forces to be dispatched in response to the Northern Iraq offensive of the Islamic State (IS) as part of Operation Inherent Resolve. At the invitation of the Iraqi government, American troops went to assess Iraqi forces and the threat posed by ISIL.
— German capture of Oesel, Dagö and Moon Islands (now Saaremaa, Hiiumaa and Muhu).
— Planned Allied amphibious landing on the Belgian coast.
— operation by the Austro-Hungarian Army against Italy (Italian northern front): the largest mountain battle ever fought.
