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| 1923, May 1 |
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| Start of the war between the Italians and the Sanusiyya. The Italian governor of Cyrenaica declared all agreements with the Sanusiyya to be void. | 1 |
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| 1927, March 9 |
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| Termination of the local administrations in Cyrenaica and Tripolitania. The Italians permanently abandoned the principle of self-government for the Libyans. | 2 |
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| 1928, June |
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| A decree made all public lands suitable for agriculture available only to Italian settlers. | 3 |
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| 1929, Jan. 24 |
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| Union of Tripolitania and Cyrenaica under one colonial administration. | 4 |
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| 1931, Sept. 11 |
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| Capture and execution (Sept. 16) by Italian authorities of al-Sayyid Umar al-Mukhtar, local leader of the Sanusiyya resistance. This event marked the end of the eight-year Sanusiyya insurrection in the Libyan interior. | 5 |
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| 1940, June |
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| Al-Sayyid Idris agreed to organize a Sanusi force to fight with the British in Cyrenaica. | 6 |
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| 1942, Jan 8 |
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| The British promised that Libya would not be returned to Italian rule after the war. | 7 |
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| 1943, Feb |
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| Completion of the British occupation of Cyrenaica and Tripolitania, where separate administrations were set up. The French had already established themselves in Fezzan. (See Libya) | 8 |
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