Dignity & Defiance - The Life of the Ghetto: People and Organizations - Dignity & Defiance: "Buoyed by its success, the ZOB spent the next few months in preparation for the final Nazi offensive. Bunkers were built and supplies, such as were available, were stored. The ZOB's active units consisted of approximately 330 fighters, and another 165 in smaller independent units.
The final liquidation of the Ghetto began on Monday, April 19, 1943, the eve of Passover, the Jewish festival of liberation. The Nazis were initially forced to retreat, and finally had to burn the Ghetto, using poison gas and tear gas, to achieve their victory. The Jewish command staff largely either fell in the fighting or died in the ZOB headquarters bunker at 18 Mila Street on May 8. Only a handful survived, including Marek Edelman, Yitzhak Zuckerman, and Zivia Lubetkin."
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