How many revolutions occurred in rusSIa between 1900 and 1930?

3 main ones. 1905/06 - Peasants, workers and middle classes rebelled against the opression and incompetence of Tsar Nicholas II. he managed to appease them with concessions like clearing mortgage payments on farms and a kind of bi-cameral parliament known as the Duma. 1917 - Feb - mainly occured because Nicholas II went back on most of his promises and retained his autocratic control. The people overthrew him and sent him to Siberia but did not execute him and his family. the middle classes set up a Provisional government but it was not very effective. 1917 - Oct - because the P Gov wanted to keep Russia in the WW1 and because of famine etc the Communists (known as the Bolsheviks) took power. and set up their own government under the banner of Lenin and Trotsky