Irgun (Hebrew: אִרְגּוּן; full title: הָאִרְגּוּן הַצְּבָאִי הַלְּאֻמִּי בְאֶרֶץ יִשְׂרָאֵל Ha-Irgun Ha-Tzvai Ha-Leumi be-Eretz Yisrael, lit. "The National Military Organization in the Land of Israel"), was a Zionist paramilitary group that operated in Mandate Palestine between 1931 and 1948. Irgun is responsible for some attacks like the bombing of the King David Hotel in Jerusalem on 22 July 1946 and the Deir Yassin massacre. Irgun was described a terrorist group by Britain, the 1946 Zionist Congress, the Jewish Agency and others such as Albert Einstein, Hannah Arendt and Winston Churchill. The Irgun was a political predecessor to Israel's right-wing Herut party, which led to today's Likud party.
