In April 1943 — 80 years ago this month — rumors of an upcoming deportation were rampant among Jews in the Warsaw Ghetto. Even during this dark time, residents continued to prepare for Passover, which takes place in the spring and celebrates the biblical story of the Israelites’ Exodus from Egypt after being enslaved for hundreds of years. They baked matzos, obtained wine if possible, and koshered their dishes. Meanwhile, a group of resistance fighters prepared makeshift armaments to resist the imminent liquidation of all Jews in the ghetto by the Nazis. For them, Passover was more than just a...