Nagorno-Karabakh is an enclave of ethnic Armenians that was—and officially still is—part of Azerbaijan. When the Soviet Union collapsed in 1991, the Karabakhis went to war against Azerbaijan, with help from Armenia proper. Though a ceasefire was signed in 1994, no peace settlement has ever been reached. Azerbaijan still wants to reclaim Karabakh, and Karabakhis swear they'll never let that happen. It was the scene of the first post-Soviet conflict, and with relations growing tense and peace efforts by the international community coming to nothing, there's a fear that the fighting could resume.