The overthrow of tsarism is the most important milestone on the way to the Great October. Back in 1905, V. I. Lenin foresaw that the victory of the bourgeois-democratic revolution in Russia "would be the end of a democratic coup and the beginning of a decisive struggle for a socialist coup." 1 Already in "Letters from Far Away," Lenin with ingenious insight determined the conditions for victory, originality and prospects for the development of the February Revolution. The speed with which the monarchy collapsed was largely due to the fact that the workers used the richest experience of the class battles of 1905-1907.