Book S.N. Bazanova - an attempt to answer the question why the high patriotic upsurge, with which a significant part of the Russian population met the First World War, began to fade less than a year later, and by its end resulted in the dissolution of the army and the predatory Brest peace. The author considers the attitude to the war and political events of that time of different circles of the population, primarily front-line soldiers. The situation in the country and the army in 1917 is shown in the most detail, when, from the surge of revolutionary patriotism caused by the overthrow of the autocracy, the soldiers switched to anti-war actions and ultimately supported the Bolsheviks who opposed the war. For students and teachers of historical specialties, as well as for representatives of other humanitarian areas and all interested in the history of Russia.