What major events lead the U. S. to become involved in WW2?

When Japan threw a surprise attack on Pearl Harbor and many soldier's lives were lost.

Explanation:

On December 7, 1941, following the Japanese bombing of Pearl Harbor, the United States declared war on Japan. Three days later, after Germany and Italy declared war on it, the United States became fully engaged in the Second World War.

Explanation:

answer: held for the purpose of bringing nazi war criminals to justice, the nuremberg trials were a series of 13 trials carried out in nuremberg, germany, between 1945 and 1949

explanation:

probably that america is racist