Irgun (shorthand for Irgun Tsvai-Leumi, also spelt Irgun Zvai Leumi), was founded in Jerusalem in 1931 by Avraham Tehomi, to levy war against the British and Arabs in the British Mandate of Palestine, prior to the founding of the State of Israel. In 1943 Menachem Begin, who later became Prime Minister of Israel, became its leader. Later on, the Irgun was merged into the Israeli Defence Force.
Irgun terrorist attacks:
- [[July 22], 1946 - Irgun bombs King David Hotel in Jerusalem, headquaters of the British civil and military administration, killing 91 people (17 of whom were Jews) (Source: )
- October 31, 1946 - Irgun bombs British Embassy in Rome, Italy. (Source: ).
- September 29, 1947 - Irgun bombs police station in Haifa, Palestine, killing four British and four Arab policemen, and two Arab civilians. (Source: ).
- December 29, 1947 - Irgun throws grenades into cafe in Jerusalem, Palestine, killing 11 Arabs and 2 British policemen. (Source: ).
- April 9, 1948 - Irgun and Palestinian soldiers clashed in the Deir Yassin incident during the battle for Israel's independence. The Irgun is alleged to have killed 254 Arab women and children during this battle. Whether a massacre of civilians actually occured disputed by some.