Louis Farrakhan, the ailing leader of the Nation of Islam, delivered what he billed as his farewell address to a crowd in Detroit on Sunday.
Farrakhan, 73, stressed religious unity and said that the world is at war because Christians, Muslims and people of other faiths are divided.
The gathering at Detroit's Ford Field capped the Nation of Islam's three-day convention in the city where it was founded in 1930.
The Nation of Islam, which promotes black empowerment and nationalism, was rebuilt by Farrakhan in the late 1970s after W.D. Mohammed, the son of longtime leader Elijah Mohammed, moved his followers toward mainstream Islam.
The Associated Press contributed to this report.