Artsakh, officially the Republic of Artsakh (/ˈɑːrtsɑːx, -sæx/) or the Nagorno-Karabakh Republic (/nəˌɡɔːrnoʊ kærəˈbæk/), is a breakaway state in the South Caucasus whose territory is internationally recognised as part of Azerbaijan. Artsakh controls a part of the former Nagorno-Karabakh Autonomous Oblast, including the capital of Stepanakert. It is an enclave within Azerbaijan. Its only overland access route to Armenia is via the 5 km (3.1 mi) wide Lachin corridor which is under the control of Russian peacekeepers.