The Irgun (Hebrew: ארגון; full title: Hebrew: הארגון הצבאי הלאומי בארץ ישראל Hā-ʾIrgun Ha-Tzvaʾī Ha-Leūmī b-Ērētz Yiśrāʾel, lit. "The National Military Organization in the Land of Israel"), or Etzel (Hebrew: אצ"ל) (sometimes abbreviated IZL), was a Zionist paramilitary organization that operated in Mandatory Palestine between 1931 and 1948. It was an offshoot of the older and larger Jewish paramilitary organization Haganah (Hebrew: Hebrew: הגנה, Defence). The Irgun has been viewed as a terrorist organization or organization which carried out terrorist acts.
The Irgun policy was based on what was then called Revisionist Zionism founded by Ze'ev Jabotinsky. Two of the operations for which the Irgun is best known are the bombing of the King David Hotel in Jerusalem on 22 July 1946 and the Deir Yassin massacre that killed at least 107 Palestinian Arab villagers, including women and children, carried out together with Lehi...