As a prisoner of war, Sub Lieut. John Pryor encrypted information and requests for supplies in letters sent from a German camp to his family in Cornwall. Plymouth University hide caption

itoggle caption Plymouth University

The names of Jeffrey Katz's family members are depicted on "stumbling stones" in Lembeck, Germany. His relatives owned a home on the property near the stones, before they were evicted in 1942. Jeffrey Katz/NPR hide caption

itoggle caption Jeffrey Katz/NPR

May 7, 1945: In Frankfurt, Germany, Allied commanders including British Field Marshal Bernard Montgomery, U.S. Gen. Dwight D. Eisenhower, Soviet Marshal Gregori Zhukov and others celebrate the German surrender. AFP/Getty Images hide caption

itoggle caption AFP/Getty Images