Mossad LeAliyah Bet
The Mossad LeAliyah Bet (Hebrew: המוסד לעלייה ב', lit. 'Institution for Immigration B') was a branch of the paramilitary organization Haganah in British Mandatory Palestine, and later the State of Israel, that operated to facilitate Jewish immigration to British Palestine. During the Mandate period, it was facilitating illegal immigration in violation of governmental British restrictions.