On the eve of Passover 1943 — the nineteenth of April — a group of several hundred poorly armed young Jews began the Warsaw Ghetto Uprising, one of the first insurrections against Nazism.

For a small group of fighters, realizing — in the lyrical words of one militant — that “dying with arms is more beautiful than without,” an isolated group of Jewish militants resisted for twenty-nine days against a much larger foe, motivated by a desire to kill as many fascists as they could before they themselves were killed. The uprising, etched into the collective memory of postwar Jewry, remains emotive and emboldening.

That their heroism was a crucial part of the war is disputed by nobody today. But less known is the extent to which the uprising, far from being a spontaneous one of the masses, was the product of planning and preparation from a relatively small — incredibly young — group of Jewish radicals.