When thousands of women workers went on strike on International Women's Day in Petrograd, Russia, in 1917 they had ignored advice from Bolshevik party leaders to "keep cool".
Once they were on the streets the Bolsheviks went all out to build their struggle. Leon Trotsky would later write, "Women's Day passed successfully, with enthusiasm and without victims. But what it concealed in itself no one had guessed even by nightfall." For that day's action was the trigger for the Russian revolution that was to transform the lives of millions.