https://en.m.wikipedia.org/wiki/Sabra_and_Shatila_massacre

From approximately 18:00 on 16 September to 08:00 on 18 September 1982, a widespread massacre was carried out by the militia, while the Israeli Defence Forces (IDF) had the camp surrounded. The militia had been ordered by the IDF to clear Palestine Liberation Organization(PLO) fighters out of Sabra and Shatila, as part of the IDF's maneuvering into West Beirut. As the massacre unfolded, the IDF received reports of atrocities but did not take any action to prevent or stop the massacre.

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