Which was an effect of the Russian Revolution on World War I ?

humiliating defeat of Russia by Germany

German victory on the Western Front

alliance between Russia and Serbia

entrance of the United States into the war

The first one, humiliating defeat of Russia by Germany

Explanation:

Russia pulled out of the war and was engaged in a civil war which occupied most of the nation, and allowed Russia to pull troops to the Western front for their upcoming Spring offensive

its perfect how it was

possible the invasion of room could have been avodiable but the people of rome were to stubboron and to wealthy the kingdoms saw them as a threat if they dialred it downa   bit ten i dont think they wouldnt failed   china was not iacvvdoaible they caused war to much and were out of hand therefor that must have happened india i dont really know it could of