Reasons For Russia To Enter World War Two

In June 1941 because of the Germany was going to occupy Russia, Russia—The Soviet Union enter the World War Two in order to protect themselves. There is an arguments about should Russia or Soviet Union enter the war or not,I believe that it was right for the Russia to enter the world war two.There were three reasons to explain that Russia should enter the world war two. The first reason is that Germany broke the attack Russia and occupy many territories of Russia. The second reason is that Russia should help the rest of Europe in order to protect themselves and provide the energy to them . The third reason is that the soviet Union wants to expand territory and the number of republicans.