1917 February, RUSSIAN REVOLUTION
Broke out in Petrograd. After three years of ruinous war the old regime collapsed. By March, a provisional government under Alexander Kerensky was set up. During the ensuing revolution the Jews were caught in the middle. Much of the conflict centered around the south and west, where over 3 million Jews lived. It is estimated that over 2000 pogroms took place, especially in the Ukraine, leading to the death of 100,000-200,000 Jews within the next 3 years.