Question

What was the main reason why the US officially joined WWII on the Allies’ side?


the Zimmerman Telegram was intercepted, and the US was worried that Germany was attempting to get Mexico to attack from the south


the US was concerned that Germany was close to creating and using an atomic bomb in Europe


the surprise attack at Pearl Harbor in Hawaii on December 7th, 1941, killing Americans and destroying American ships and airplanes.


all of these

Answer 1

Answer for this question is option (C)- The surprise attack at Pearl Harbor in Hawaii on December 7th, 1941, killing Americans and destroying American ships and Airplanes.

However, Americans have no intention in joining the Allied forces in the World War II the drastic incident at the Pearl Harbor made them to join. American president FDR declared war on Japan which was a part of Axis Forces. This made the Germany to declare war on America. The triangular declaration of war made the Americans to involve in the World War II, completely.