Answer
Muammar Gaddafi participated in 1969 Libyan Coup D'état.
The 1969 Libyan coup d'état, also known as the al-Fateh Revolution or the 1 September Revolution, was carried out by the Free Officers Movement, a group of military officers led by Colonel Muammar Gaddafi, which led to the overthrow of the Senussi monarchy of King Idris I and the creation of the Libyan Arab Republic.