Joining the ranks of Unbroken, Band of Brothers, and Boys in the Boat, the little-known saga of young German Jews, dubbed The Ritchie Boys, who fled Nazi Germany in the 1930s, came of age in America, and returned to Europe at enormous personal risk as members of the U.S. Army to play a key role in the Allied victory.

In 1942, the U.S. Army unleashed one of its greatest secret weapons in the battle to defeat Adolf Hitler: training nearly 2,000 German-born Jews in special interrogation techniques and making use of their mastery of the German language, history, and...