The Libyan resistance, associated with the Senussi Order, was initially led by Omar Mukhtar (Arabic عمر المختار "‘Umar Al-Mukhtār", 1862–1931), who was from the tribe of Mnifa. The First Italo-Senussi War had two main active phases: the Italo-Turkish War (1911–12), when Italy invaded Libya, and the Senussi Campaign (1915–17), part of World War I, in which Italian and British forces fought the Ottoman and German-supported Senussi. The Libyans were eventually defeated. After a period of relative peace, the Second Italo-Senussi War broke out in 1923 and lasted until 1932.