In January 1905, government troops massacred protesters in Saint Petersburg. Unrest soon spread across the Russian Empire in what came to be known as the Revolution of 1905. Georgia was particularly affected. Stalin was in Baku in February when ethnic violence broke out between Armenians and Azeris; at least 2,000 were killed. He publicly lambasted the "pogroms against Jews and Armenians" as being part of Tsar Nicholas II's attempts to "buttress his despicable throne". Stalin formed a Bolshevik Battle Squad which he used to try to keep Baku's warring ethnic factions apart; he also used the unrest as a cover for stealing printing equipment. Amid the growing violence throughout Georgia he formed further Battle Squads, with the Mensheviks doing the same. Stalin's squads disarmed local police and troops, raided government arsenals, and raised funds through protection rackets on large local businesses and mines. They launched attacks on the government's Cossack troops and pro-Tsarist Black Hundreds, co-ordinating some of their operations with the Menshevik militia.