Final answer:
The subject of this question is the Bolshevik Revolution, which resulted in the Treaty of Brest-Litovsk.
Step-by-step explanation:
The subject of this question is the Bolshevik Revolution.
The Bolshevik Revolution, also known as the October Revolution, took place in 1917 in Russia. It was a key event in history that led to the establishment of the Soviet Union. The revolution resulted in the signing of the 1918 Treaty of Brest-Litovsk, which allowed Germany to focus on the Western Front during World War I.
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