During the February Revolution, a crowd broke into the prison and returned Broz to the POW camp. A Bolshevik he had met while working on the railway told Broz that his son was working in an engineering works in Petrograd.
In February 1917, the February Revolution broke out in St. Petersburg – renamed Petrograd at the beginning of the First World War – as industrial workers went on strike over food shortages and deteriorating factory conditions.
Stalin was in the city when the February Revolution took place; uprisings broke out in Petrograd—as Saint Petersburg had been renamed—and Tsar Nicholas II abdicated to escape being violently overthrown. In Old style it was on 23/2/1917.