Day of Revenge settlers by the 1960s. The Italian population was concentrated in the coast around the cities of Tripoli (37 percent of its population) and Bengasi (31 percent). With the Italian defeat in World War II, Italian influence waned. After several years under British mandate, on 24 December 1951 Libya declared its independence as the United Kingdom of Libya (a constitutional, hereditary monarchy under King Idris). Although many Italians had already left the former colony, many remained (primarily farmers and craftsmen). King Idris was a tolerant monarch, and generally treated the Italian population well. Libyan Jews (who had lived in Libya since
Italian guerrilla war in Ethiopia to accept an Italian protectorate with these conditions: In the summer of 1942, the most successful units were those led by Colonel Calderari in Somalia, Colonel Di Marco in the Ogaden, Colonel Ruglio amongst the Danakil and "Blackshirt centurion" De Varda in Ethiopia. Their ambushes forced the British to dispatch troops, with airplanes and tanks, from Kenya and Sudan to the guerrilla-ridden territories of the former Italian East Africa. That summer, the British decided to put most of the Italian population of coastal Somalia into concentration camps, in order to avoid their possible contact with Japanese submarines. In October 1942,