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Irena Sendler was a Polish social worker and hero during World War II who courageously saved approximately 2,500 Jewish children from the Warsaw Ghetto between 1940 and 1943. Officially, she was employed as a social worker and had access to the Warsaw Ghetto, where over 400,000 Jews were confined in horrific conditions. Under the alias "Jolanta," she entered the ghetto repeatedly under the pretense of inspecting for contagious diseases, a peculiar paranoia of German authorities.

She Got Inside Legally—Then Stayed Illegally

Irena’s position with the city’s social welfare department gave her perfect cover to undertake her work with Żegota, the Polish underground Council to Aid Jews. Typhus was raging, so Polish nurses were allowed past the ghetto walls to disinfect houses. She arrived early in the morning when the guards were changing and security was slightly lax; she flashed her permit and strolled inside. Her “disinfection visits” turned into rescue planning sessions for the ghetto’s children.

She meticulously recorded the children’s names onto thin cigarette papers rolled inside a jar that she then buried under an apple tree. These lists included each child’s original Jewish name along with the new Christian identity given to protect them. This secret record-keeping was essential for the future hope that surviving children could be reunited with their biological families after the war ended.

Sedatives in Tiny Doses, Coffins, Potato Sacks

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In order to smuggle them out without the risk of being heard, infants were given a drop of sedative on the tongue. Older kids were placed in coffins told to act as if they were stricken dead with typhus if anyone peeked inside. Others slid into burlap potato sacks, heads poking out just enough to breathe, and were carried out by garbage crews.

Every route was a gamble as German patrols were unpredictable, and forged papers could be questioned. One frightened child could jeopardize the entire operation. Yet thousands of children made it through these narrow seams in the ghetto.

Fake Deaths and Forged Baptisms

Sendler’s network worked closely with sympathetic priests, nuns, and civil clerks who risked their lives forging baptismal papers and birth records. This was one of the most reliable ways to slip a Jewish child into the “Aryan side.” Some children were officially listed as deceased in the ghetto’s medical rolls, a tactic coordinated with doctors who quietly edited paperwork so the child could be removed without suspicion.

Sendler's team placed children in foster care with local families who pretended that the children were their own or that of relatives. When she couldn’t find suitable families, she opted for orphanages and convents, all arranged with false papers to help conceal the children's true identities.

Ambulances with False Bottoms

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Her crew modified Red Cross ambulances by incorporating hidden compartments barely deeper than a suitcase in the wooden floor. Children were instructed to lay flat and remain silent while drivers chatted with SS officers. One driver kept a barking dog in the front seat; nobody wanted to search too close to teeth.

One driver is said to have kept a barking dog in the front seat, knowing that the presence of the dog would deter thorough searches. The ambulance routes operated daily, enabling frequent smuggling missions.

Caught, Tortured, Never Talked

Irena Sendler was arrested by the Gestapo in October 1943. She was taken to the Gestapo headquarters at Szucha Avenue in Warsaw, where she was brutally beaten and tortured. They broke both her legs and feet and questioned her for months about the people she’d been working with. She gave them nothing and was eventually scheduled for execution.

At the last moment, her organization, Żegota, bribed a guard and she was tossed, half-dead, into a forest. She went into hiding to avoid re-arrest, and despite the immense danger, resumed her rescue work clandestinely.

At the end of World War II in 1945, Irena Sendler and her associates unearthed the glass jars buried under the apple tree and saw that her list contained approximately 2,500 Jewish children she had saved from the Warsaw Ghetto.