Bolshivik's were the members of the communist parties who revolted against the russian Tsar in 1917 and formed the USSR in 1922
America entered the 1st world war in 1917. it waited till this date for many reasons. when Russia signed a peace treaty with Germany because of the former bolshivik revolution, america entered with the allied powers to balance power. it waited till this date also to be the saver of humanity, as it is claimed america entered the war to save humanity from hitler.I n fact it entered the war to apply the wilsonian world order or what is now known as globalisation to be at the top of the world.
At first they tried to remain neutral but when they realized that Britain and France were close to losing the war they entered in 1917 because they thought that if Germany won it would be a direct threat to democracy.