This volume of the three-volume publication "The First World War and the End of the Russian Empire" is devoted to the February Revolution, the origin and course of revolutionary events in Petrograd in the February-March days of 1917, which led to the overthrow of the monarchy in the country. By its genre, this volume is not a collective work based on the unity of the concept, and not a collection of only thematically close to each other articles, but a book of essays devoted to a versatile consideration and assessment of one of the fundamental problems of Russian history.