Yitzhak Sadeh, was the commander of the Palmach and one of the founders of the Israel Defense Forces at the time of the establishment of the State of Israel.

The Palmach was the elite (sayeret) fighting force of the Haganah, the underground army of the Yishuv during the period of the British Mandate for Palestine. The Palmach was established in May 1941. By the outbreak of the 1948 Arab–Israeli War, it consisted of over 2,000 men and women in three fighting brigades and auxiliary aerial, naval and intelligence units. With the creation of Israel's army, the three Palmach Brigades were disbanded. This and political reasons compelled many of the senior Palmach officers to resign in 1950.