Yes, the United States participation in World War II was necessary, because it was the United States' involvement that ultimately put an end to the war. The United States had determination, weapons, and resources that were unmatched in the rest of the world. The United States should have gotten involved in World War II much sooner than it did.
The United States was correct to participate in World War II. Even before Japan attacked Pearl Harbor, the United States was supporting the allies through the Lend Lease program. It is also clear that the allies were justified in stopping the Nazis because they were committing war crimes and genocide.
I believe it was necessary for the United States to participate in World War II. The United States let a lot of things happen prior to their involvement and stayed out of it until we were attack at Pearl Harbor. This led to our entrance, which seems befitting given the circumstances.
I usually do not support our getting into wars whenever another country has a problem, but world war II is a case of its own. The bombing at Pearl Harbor, along with the horrendous atrocities committed against Jewish people, sympathetic Christians, gays, and other populations demanded that there be intervention.
In the scenario of World War II where nations and countries aligned themselves with each other, it was necessary for the United States to be within the war. The tragedies and injustices of World War II will never be forgotten and the United States attempted to stay out of it for awhile, but given that it became a global battle, it was impossible to stay neutral.
D d d d d d d d d d d d d d d d d d d d d d d dd d d d d d d d dd dd d d d d d d d dd d dd d d d d d d day