Colin L. Powell, who in four decades of public life served as the nation’s top soldier, diplomat and national security adviser, and whose speech at the United Nations in 2003 helped pave the way for the United States to go to war in Iraq, died on Monday. He was 84.

He died of complications from Covid-19, his family said in a statement. He was fully vaccinated and was treated at Walter Reed National Military Medical Center, his family said.