The appointment of Chirine as War Minister spurred the Free Officers into action, and on 22 July their leaders, General Muhammad Naguib and Colonel Gamal Abdel Nasser, decided on a coup the next day. Learning from one of his spies that the coup was due to begin tomorrow, at about 7 pm, Farouk ordered the arrest of all the Free Officers. Two Free Officers living in Alexandria were so convinced the coup would fail that the evening of 23 July that they went to the Montaza palace to confess and seek a royal pardon. Finally, on the night of 23 July 1952, the Free Officers, led by Muhammad Naguib and Gamal Abdel Nasser, staged a military coup that launched the Egyptian Revolution of 1952. The Free Officers, knowing that warrants had been issued for their arrest, launched the coup that night, storming the staff headquarters in Cairo, killing two and wounding two on the night of 23 July and by about 1:30 am, Cairo was under their control.