Irgun

The Irgun (Hebrew: אִרְגּוּן‎) (full title: Ha-Irgun Ha-Tzvai Ha-Leumi be-Eretz Yisrael) (from Hebrew: הָאִרְגּוּן הַצְּבָאִי הַלְּאֻמִּי בְאֶרֶץ יִשְׂרָאֵל‎, "The National Military Organization in the Land of Israel"), was a Zionist paramilitary group that operated in Mandate Palestine between 1931 and 1948. It was an offshoot of the earlier and larger Jewish paramilitary organization Haganah (Hebrew: "Defense", הגנה). When the group broke from the Haganah it became known as the Haganah Bet (Hebrew: literally "Defense 'B' " or "Second Defense", הגנה ב), or alternatively as haHaganah haLeumit (ההגנה הלאומית) or Ha'ma'amad (המעמד‎). Irgun members were absorbed into the Israel Defence Forces at the start of the 1948 Arab–Israeli war. The Irgun is also referred to as Etzel (אצ"ל), an acronym of the Hebrew initials, or by the abbreviation IZL.

The Irgun policy was based on what was then called Revisionist Zionism founded by Ze'ev Jabotinsky. According to Howard Sachar, "The policy of the new organization was based squarely on Jabotinsky's teachings: every Jew had the right to enter Palestine; only active retaliation would deter the Arabs; only Jewish armed force would ensure the Jewish state".

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, carried out together with Lehi on 9 April 1948.

The Irgun has been viewed as a terrorist organization or organization which carried out terrorist acts. In particular the Irgun was branded a terrorist organisation by Britain.

The Irgun was a political predecessor to Israel's right-wing Herut (or "Freedom") party, which led to today's Likud party. Likud has led or been part of most Israeli governments since 1977.