How did Muammar al-Qaddafi take power in Libya in 1969?

On September 1, 1969, Muammar al-Qaddafi led a group of young army officers in a successful military coup that deposed King Idris I.12

Qaddafi, who had graduated from the military academy in 1965, had been planning the overthrow of the monarchy for years with the assistance of fellow officers. The coup was precipitated by growing resentment among the military and urban middle class toward the king’s socially conservative policies, his aloofness from Arab nationalism, and his failure to speak out against Israel during the 1967 Six-Day War.312

The takeover occurred while King Idris was at a spa in Turkey for medical treatment. Following the coup, Qaddafi proclaimed Libya a republic and was named commander in chief of the armed forces and chairman of the new governing body, the Revolutionary Command Council.132