This document provides background information on the Nagorno-Karabakh conflict between Armenia and Azerbaijan. It discusses the history of the region and how it has alternated between Armenian and Azerbaijani control over centuries. It also describes key events in the conflict, including violence in Sumgait and Baku in 1988, the Khojaly massacre in 1992 that killed over 600 civilians, and the ceasefire in 1994. The ongoing dispute over the region's status and Armenia's occupation of surrounding Azerbaijani territory is noted.