Maduro was 23 and a law student at Leiden University when Germany invaded the Netherlands on 10 May 1940. By a royal order on 21 November 1939 Maduro had been previously appointed to second-lieutenant-reserve in the Dutch Cavalry.
Distinguished himself in battle on May 10, 1940 by superior acts of courage, ingenuity, and loyalty. As Commander of a platoon of young soldiers, he planned and prepared, with great skill and on his own initiative, the attack on the enemy-occupied villa 'Leeuwenburg' behind the Vliet in Rijswijk. With considerable courage, leading two groups of young soldiers, he crossed the bridge over the Vliet while under enemy machine-gun fire, personally led the attack on the fortified base (Villa 'Leeuwenburg'), and in the assault was the first to force his way in, breaking the resistance and taking the occupants prisoner.
On 15 May 1940, upon the capitulation of the Dutch military, Maduro was captured by German troops and jailed in the Oranjehotel in Scheveningen.[1]
When he was released a half year later, the German occupation forces had required that all Jews wear the Star of David. Maduro refused to do so and joined the resistance movement. He became active in smuggling Allied pilots into the United Kingdom via Spain. After much success Maduro was eventually captured by Nazi forces and placed in jail again.
Months later, after a daring escape he rejoined the Dutch resistance but was ultimately betrayed by a Belgian collaborator and captured again, this time by the German Gestapo, who jailed him first at Saarbrücken. During an Allied bombing raid, Maduro's jail wing was directly hit, freeing him and several other prisoners from their cells. Instead of fleeing, Maduro rushed to the rescue of several injured prisoners that had been buried by rubble, likely saving their lives.
Months later, he was transferred to Dachau concentration camp. In February 1945, barely three months prior to the liberation of the camp by American troops, Maduro died of typhus. It is presumed that he is buried in the cemetery of the camp.
After World War II, Maduro's parents donated the initial capital necessary to build Madurodam, a miniature city that opened in 1952 and which they meant to serve as a memorial in honor of George, their only son. In 1993, a scale model of Maduro's birthplace in Curaçao was built in the park. The entirety of net proceeds from the park are donated to various charities throughout the Netherlands.