For 10 points, name this 1988-1994 ethnic conflict over the namesake doubly-eponymous Caucasian enclave, fought between Armenia and Azerbaijan.
In one episode of this conflict, soldiers went door-to-door to "check passports," assisted by gunships and blowtorches, as part of Operation Ring. This conflict featured a massacre of civilians perpetrated with the help of the 366th Motor Rifle Regiment. This war's early phase featured gangs killing and raping certain residents of Sumgait. The subject of Thomas de Waal's book Black Garden, it was finally ended with the Bishkek Protocol. Amid this conflict, a country's capital was invaded after a state of emergency declared during Black January, which prompted future president (*) Heydar Aliyev to resign from the Communist Party. This war featured heavy ethnic cleansing in Stepanakert, the capital of a republic recognized by very few other countries. For 10 points, name this 1988-1994 ethnic conflict over the namesake doubly-eponymous Caucasian enclave, fought between Armenia and Azerbaijan.
In one episode of this conflict, soldiers went door-to-door to "check passports," assisted by gunships and blowtorches, as part of Operation Ring.
Nagorno-Karabakh War [or the Artsakh Liberation War]