The Iraq disarmament crisis was one of primary issues that led to the multinational invasion of Iraq on 20 March 2003. Since the 1980s, Iraq was widely assumed to have been producing and extensively running the programs of biological, chemical and nuclear weapons. During the heights of Iran–Iraq War, Iraq had used its offensive chemical program against Iran and Kurdish civilians, also in the 1980s. With the French and Soviet assistance given to Iraqi nuclear program, its primary facility was secretly destroyed by Israel in 1981.