The First Nagorno-Karabakh War was an ethnic and territorial conflict that took place from February 1988 to May 1994 in the enclave of Nagorno-Karabakh in southwestern Azerbaijan between the majority ethnic Armenians of Nagorno-Karabakh backed by Armenia, and the Republic of Azerbaijan with support from Turkey. As the war progressed, Armenia and Azerbaijan, both former Soviet republics, entangled themselves in protracted, undeclared mountain warfare in the mountainous heights of Karabakh as Azerbaijan attempted to curb the Karabakh Movement.