A Canadair CL-44 and Sukhoi Su-15 collide in mid-air near Yerevan, Armenia, killing four.

The Canadair CL-44 was a Canadian turboprop airliner and cargo aircraft based on the Bristol Britannia that was developed and produced by Canadair in the late 1950s and early 1960s. Although innovative, only a small number of the aircraft were produced for the Royal Canadian Air Force (RCAF), and for commercial operators worldwide.

The Sukhoi Su-15 is a twinjet supersonic interceptor aircraft developed by the Soviet Union. It entered service in 1965 and remained one of the front-line designs into the 1990s. The Su-15 was designed to replace the Sukhoi Su-11 and Sukhoi Su-9, which were becoming obsolete as NATO introduced newer and more capable strategic bombers.

The 1981 Armenia mid-air collision occurred on 18 July 1981 when a Soviet Air Defense Forces Sukhoi Su-15 crashed into the tail of a Transporte Aéreo Rioplatense Canadair CL-44 commercial transport which had strayed into Soviet airspace over the Armenian Soviet Socialist Republic. The three crew and one passenger on the Argentine aircraft died; the Soviet pilot was able to eject to safety.

Yerevan is the capital and largest city of Armenia, as well as one of the world's oldest continuously inhabited cities. Situated along the Hrazdan River, Yerevan is the administrative, cultural, and industrial center of the country, as its primate city. It has been the capital since 1918, the fourteenth in the history of Armenia and the seventh located in or around the Ararat Plain. The city also serves as the seat of the Araratian Pontifical Diocese, which is the largest diocese of the Armenian Apostolic Church and one of the oldest dioceses in the world.