How did the withdrawal of Russia impact the events of World War I?

Question

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The United States began sending troops to Europe.

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The Triple Entente surrendered to the Triple Alliance.

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The Ottomans launched an invasion into the Balkans.

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Germany could focus its fighting on the Western Front.

Answer 1

The correct impact of Russia's withdrawal from World War I is:

Germany could focus its fighting on the Western Front.

The withdrawal of Russia following the Treaty of Brest-Litovsk in March 1918 allowed Germany to move troops from the Eastern Front to the Western Front, thereby intensifying their military efforts against France and Britain.