 The unit's members were sent into occupied Europe, mainly by airdrop, to help organise and participate in local resistance activities on the ground.Some 250 men and women volunteered, of whom 110 underwent training and 37 were infiltrated.In December 1942, when the mass murder of European Jewry became known to the Allies, the British continued to refuse to change their policy of limited immigration, or to admit Jews from Nazi controlled Europe in numbers outside the quota imposed by the White paper, and the Royal Navy prevented ships with Jewish refugees from reaching Palestine.