Muammar Gaddafi became the "de facto" leader of Libya on 1 September 1969 after leading a group of young Libyan Army officers against King Idris I in a bloodless coup d'état. After the king had fled the country, the Revolutionary Command Council (RCC) headed by Gaddafi abolished the monarchy and the old constitution and established the Libyan Arab Republic, with the motto "freedom, socialism and unity".