The Libyan genocide, also known in Libya as Shar (Arabic: شر, lit. 'Evil'), was the genocide of Libyan Arabs and the systematic destruction of Libyan culture during and after the Second Italo-Senussi War between 1929 and 1934. During this period, between 20,000 and 100,000 Libyans were killed by Italian colonial authorities under Benito Mussolini. Near 50% of the population of Cyrenaica was deported and interned in concentration camps, resulting in a population decline down to 142,000 from an initial 225,000.
This period was marked by a brutal campaign characterized by widespread major Italian war crimes, including ethnic cleansing, mass killings, forced displacement, forced death marches, settler colonialism, the use of chemical weapons, the use of concentration camps, mass executions of civilians and refusing to take prisoners of war and instead executing surrendering combatants. The indigenous population, particularly the nomadic Bedouin tribes, faced extreme violence and suppression in an attempt to quell Senussi resistance to colonial rule, whose population was reduced by half.