Answer:
The significance that you are most likely looking for has to do with World War I. In this case, the Czar and Russia was partaking in World War I, forcing Germany and the Central Power to effectively fight two fronts at the same time. However, with the Bolshevik takeover, the Bolshevik government signed a peace treaty with Germany, which allowed for Germany to concentrate all her forces to the west in an effort to take Paris.
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Essentially, the significance is the formation of only one-front war, and Germany's last offensive for Paris. They will fail however, and surrender soon after.