United States of Islam was created in 1990.

I don't really understand your question, but there are a lot of Muslims in the U.S..

the united states prison system. about 70% of Americans who converted to Islam did so in prison.

Elijah Muhammad was a Muslim Imam (Priest) who was founder of the "Nation of Islam"; a Muslim community in the United States.

It was important as it stopped the spread of Islam (the Muslim belief) and let Christianity continue flourishing. If not for the Christians winning, the primary religion of the United States would be Islam.