The Deir Yassin massacre took place on April 9, 1948, when Zionist paramilitaries attacked the village of Deir Yassin near Jerusalem, then part of Mandatory Palestine, killing at least 107 Palestinian Arab villagers, including women and children. The attack was conducted primarily by the Irgun and Lehi, who were supported by the Haganah and Palmach. The massacre was carried out despite the village having agreed to a non-aggression pact. It occurred during the 1947–1948 civil war and was a central component of the Nakba and the 1948 Palestinian expulsion and flight.
On the morning of April 9, Irgun and Lehi forces entered the village from different directions. The Zionist militants massacred Palestinian Arab villagers, including women and children, using firearms and hand grenades, as they emptied the village of its residents house by house. The inexperienced militias encountered resistance from armed villagers and suffered some casualties. The Haganah directly supported the operation, providing ammunition and covering fire, and two Palmach squads entered the village as reinforcement. A number of villagers were taken captive and paraded through West Jerusalem before being executed.
