Armenia–Russia relations

Bilateral relations between modern-day Armenia and the Russian Federation were established on 3 April 1992, though Russia has been an important actor in Armenia since the early 19th century. The two countries' historic relationship has its roots in the Russo-Persian War of 1826 to 1828 between the Russian Empire and Qajar Persia after which Eastern Armenia was ceded to Russia. Moreover, Russia was viewed as a protector of the Christian subjects in the Ottoman Empire, including the Armenians.

After the dissolution of the Soviet Union, Armenia joined the Commonwealth of Independent States (CIS). Armenia also joined the Collective Security Treaty Organization (CSTO), along with four other ex-Soviet countries. Among the contracts and the agreements, which determine intergovernmental relations—a treaty of friendship, collaboration and mutual aid of 29 August 1997 are a number of the documents, which regulate bases of Russian military units and liaisons in Armenia. Armenia became a full member of the Eurasian Economic Union on 2 January 2015.

In recent years, however, relations between Armenia and Russia have begun to deteriorate due to events such as the 2018 Armenian Revolution, the 2020 Nagorno-Karabakh War, the September 2022 Armenia–Azerbaijan clashes, the Russian invasion of Ukraine and especially the 2022–2023 Blockade of Nagorno-Karabakh, the 2023 Azerbaijani offensive in Nagorno-Karabakh and the Flight of Nagorno-Karabakh Armenians. Armenia de facto "froze" their CSTO membership in February 2024, and has taken steps towards formally withdrawing.