Answer:
1917
The Russian Revolution took place in 1917 when the peasants and working class people of Russia revolted against the government of Tsar Nicholas II. They were led by Vladimir Lenin and a group of revolutionaries called the Bolsheviks
The American revolution inspired the idea that a country should secede and gain independence if they believe that the ruler of the country is a malevolent tyrant. The Civil War inspired hte idea that the country needs to remain unified even if the people don't agree and that we can always find a way to keep it together. They are opposite and at the time when they were created they suited the needs of the people.
