Former British Prime Minister Margaret Thatcher died early Monday of a stroke, her family announced.
She was 87.
"It is with great sadness that Mark and Carol Thatcher announce that their mother Baroness Thatcher died peacefully following a stroke this morning," the family's statement said, according to the BBC.
Baroness Thatcher was Conservative prime minister from 1979 to 1990 and was known as the Iron Lady.
She and President Ronald Reagan worked together closely in promoting free markets and in challenging the former Soviet Union.
Baroness Thatcher, the daughter of a shopkeeper, also took Britain to war against Argentina to regain the Falkland Islands in 1982.