Yes, this is the result of a land dispute between Armenia and Azerbaijan. Basically, the Nagorno-Karabakh region has an ethnic Armenian majority and has historically been under Armenian control or influence, but it's legally recognized internationally as belonging to Azerbaijan due to some complicated Soviet fuckery. In '94, the two countries fought a conflict over this same region resulting in Armenian forces capturing this region and some other bits of Azerbaijani land. A ceasefire was negotiated and things stayed mostly quiet for awhile, but Armenia was still exerting sovereignty over the captured areas. A peaceful solution perhaps seemed like a possibility in a few years, but current Armenian leadership has taken a hard stance on the matter, which the Azerbaijani leadership doesn't like. On September 27th, Armenia declared martial law in the region, claiming Azerbaijan had launched a military operation against them. This whole situation has kind of reignited the stalled conflict and that's what we're seeing here, with Armenia attempting to fully reclaim what was theirs for so long and Azerbaijan trying to regain control of lands that are legally within their borders.