Guy Stern, who fled rising antisemitism in Nazi Germany at 15 for a new life in the United States but returned to Europe during WWII as a member of a military intelligence program that trained him to interrogate prisoners of war, died on Dec. 7 in West Bloomfield, MI. He was 101.

Mr. Stern was one of the so-called Ritchie Boys, a group named for a secret Army camp in Maryland that served as a training center — mostly for German Jews — to learn how to interrogate imprisoned German and Italian officers and translate documents to extract vital information. At least 60% of the actionable intelligence in the European theater was amassed by the Ritchie Boys, according to David Frey, director of the Center for Holocaust Studies at West Point.