Ahmed Sharif Senussi fought the French then the Italians before WWI. During WWI Ahmed ash Sharif, already a deputy in North Africa for the Ottoman caliph, was not involved in the conflict against the British. But in November 1915, encouraged by the Turks, the Senussi horsemen under him invaded Egypt and took Sallum. In February 1916 the British counterattacked and recaptured lost land. Weakened by this defeat, he conceded the leadership to his cousin Mohammed Idris (King Idris I of Libya).