The removal of the Czar from Russia in 1917, during the Russian Revolution, did not directly lead to the United States entering World War I. The U.S. entered World War I in April 1917, several months before the Russian Revolution and the removal of the Czar.
The U.S. entered World War I for a number of reasons, including the sinking of the Lusitania by a German submarine in 1915 and the interception of the Zimmermann Telegram in 1917, in which Germany proposed a military alliance with Mexico against the U.S. However, the main reason the U.S. entered the war was the country's desire to protect its economic interests and support its allies, particularly France and Britain.
The Russian Revolution, which overthrew the Czar and established a communist government, had a significant impact on the course of World War I and the global political landscape. After the revolution, Russia withdrew from the war, freeing up German troops to fight on other fronts. This had a significant impact on the outcome of the war, as the Germans were able to transfer troops to the Western Front, where they made significant gains against the Allies.
The Russian Revolution also had long-term consequences for international relations and the global political landscape. It led to the spread of communism and the Cold War between the Soviet Union and the U.S., which lasted for several decades.