Preobrazhensky Regiment
During the late afternoon of 26 February O.S (11 March N.S) the Fourth Company of the Pavlovsky Reserve Regiment broke out of their barracks upon learning that another detachment of the regiment had clashed with demonstrators near the Kazan Cathedral. After firing at mounted police the soldiers of the Fourth Company were disarmed by the Preobrazhensky Regiment. This marked the first instance of open mutiny in the Petrograd garrison.