Why did the fall of the Tsarist regime led to U.S entering World War One ?

Answer :

Answer:

The inadequate behaviour of the Tsar caused the collapse of Tsarist regime. Nicholas II`s actions and decisions caused an economic crisis in the country and destroyed his own image in the eyes of the people. ... Tsar`s decision to start the Russo-Japanese War (1903-1905) also was disastrous for the Empire.