Italy declared war on the Ottoman Empire in September 1911 and landed at Tripoli, Benghazi and other coastal points. Rachel Simon, writing in 1914-1918-Online, records that after attacks on Italian forces on 23-26 October 1911 Italy punished the local population severely, killing over 4,000. Alongside the reprisals, Italy deported Libyan notables, suspected resisters and their families to penal islands off the Italian coast: Di Pasquale's study records 900 Libyans on Ustica of whom 127 died, about 17 percent, and 1,366 on the Tremiti islands of whom 437 died, about a third, from cholera, cold and overcrowding. Italian control was largely confined to the coastal towns until the Fascist government launched the reconquest of the interior from 1923, a campaign of columns, aerial bombing and the destruction of encampments that continued past 1926 and led to the mass internment of the Cyrenaican population in camps from 1929, outside the period covered here.
Italy invaded the Ottoman provinces of Tripolitania and Cyrenaica in 1911, carried out mass reprisals at Tripoli, deported Libyan notables and captives to penal islands in Italy, and from 1923 fought a reconquest of the interior
Late Ottoman and early Italian estimates put the two provinces together at roughly 800,000 to 1 million in 1911; there was no census. The Italian census of 1936 counted 848,600 Libyans, after a quarter-century of war, famine, flight to Egypt and the Cyrenaica concentration camps.
Simon records over 4,000 killed in the Tripoli reprisals of October 1911 alone. Di Pasquale documents mortality of 17 percent on Ustica and about a third on the Tremiti islands among deportees. Totals for Libyan deaths in the fighting, in reprisals and from war-driven famine and displacement between 1911 and 1926 are not established; Libyan accounts of the whole colonial war to 1932 run far higher, and Italian scholarship lower.
The October 1911 reprisals, the deportation of civilians to Italian penal islands and the mortality there are documented in Italian military and prison-administration archives analysed by Di Pasquale and summarised by Simon.
Libya, Malta, Vatican