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; slavery should be outlawed in the new country, was part of the initial draft of the declaration of independence, but not part of the final