The Armenian–Tatar massacres (also known as the Armenian-Tartar war, the Armeno-Tartar war) refers to the bloody inter-ethnic confrontation between Armenians and Caucasian Tatars (later known as Azerbaijanis) throughout the Russian Caucasus in 1905–1907. The massacres started during the Russian Revolution of 1905. The most violent clashes occurred in 1905 in February in Baku, in May in Nakhchivan, in August in Shusha and in November in Elizabethpol, heavily damaging the cities and the Baku oilfields. Some violence, although of lesser scale, broke out also in Tiflis.