The imperial government was forced to resign, and the Duma formed a provisional government that peacefully vied with the Petrograd Soviet for control of the revolution. On March 14, the Petrograd Soviet issued Order No. 1, which instructed Russian soldiers and sailors to obey only those orders that did not conflict with the directives of the Soviet. The next day, March 15, Czar Nicholas II abdicated the throne in favor of his brother Michael (1878-1918), whose refusal of the crown brought an end to the czarist autocracy.