The Romanovs.

The immediate cause of the collapse of the Tsarist government was the gigantic strain of World War I. The core cause was the backward economic condition of the country, which made it unable to sustain the war effort against powerful, industrialized Germany. Russian manpower was virtually inexhaustible. Russian industry, however, lacked the capacity to arm, equip, and supply the some 15 million men who were sent into the war. Factories were few and insufficiently productive, and …

…workers to pass through their lines. Nicholas dissolved the Duma; the deputies accepted the decree but reassembled privately and elected a provisional committee of the State Duma to act in its place. On February 27 the revolution triumphed. Regiment after regiment of the Petrograd garrison went over to the people. Within 24 hours the entire garrison, approximately 150,000 men, joined the revolution, and the united workers and soldiers took control of the capital. The uprising claimed about 1500 victims