These were elite troops of the Haganah (the Jewish underground in Palestine). After the war, these volunteers helped Jews in Europe make the illegal journey to Palestine despite the danger of being discovered and arrested by the British.
Abbreviation for Pelugot Mahatz, shock forces. In British Palestine and until June 1948, it was a commando section of the Jewish military forces. Organized in 1941 to provide the Haganah (q.v.) with a mobile force, it consisted of young men mostly from kibbutzim, who took military training while working part-time at farming, serving in cooperation with the British army, without pay or uniforms.