After world war two the US became known as a power country so the US was way more powerful.
USA
Russia was the most powerful country in the world between 1947-1989.....and now they are 2nd only to the united states. If the U.S. were to get into war with russia at the moment Russia would win for it has a far more faster production of military supplies since its the most powerful industrial nation in the world at the moment. Russia for the time being has the most nukes in the world.
The most powerful leader in Russia during World War I was Nicholas II. In addition, Nicholas Nikolaevich and Aleksei Brusilov were leaders during WW1.
russia and united states
Because the United States Navy has the World's longest nuclear powered aircraft carrier, the USS Enterprise. The USS Enterprise can carry more planes than any other carriers. The United States Navy was the top ten most powerful navy in the World. The US navy has never been defeated in any war. Russia still has more bigger warships, but how can the US will be able to defeat Russia? Let's see about that. Are the United States Navy powerful enough to defeat Russia? I don't know they can win Russia or not. If World War three broke out let's see if the US or Russia will win the war.
russia
Russia was Serbia's main ally during World War I. Russia had a powerful army and powerful allies as well.
Russia joined world war 1 in 1914
Britain, Germany, France, Austria-Hungary, and Russia
Germany. Russia was co-operating (more or less) with the Allies.
It was about equal.
The Atom Bomb