One part of GCSE History is Russia in the first half of the 20th Century. A very major event in this topic is the Russian Revolution and the circumstances which brought it about - mainly it's poor performance in World War One.
Russia did not perform well in World War One (the Great War). Harsh conditions at home led to the February Revolution, which toppled the Tsar, and ushered in the Provisional Government. This government chose, perhaps unwisely, to continue Russia's involvement in World War One - whilst Lenin prepared to unleash the Bolshevik Revolution, which was his life's ambition.
Test you understanding of how revolution came to Russia in this quiz.