the October revolution started due to scarcity of food riot in the petrograd, leadership was lost. It was the most explosive political event in the 20th century. This revolution destroyed the Romanov dynasty and started forming political changes
The treaty of brest-litovsk was a peace treaty, between German Empire, Austria-Hungary, Bulgaria, and the Ottoman Empire), that ended Russia's participation in World War I.
The Civil war was fought in the united states from 1861 to 1865 between united states and the confederate states of america, A collection of eleven states that left the union and formed their own country in order to protect the institution of slavery