 Early in his career, Ambrose was mentored by World War II historian Forrest Pogue.In 1964, Ambrose took a position at Johns Hopkins as the Associate Editor of the "Eisenhower Papers", a project aimed at organizing, cataloging and publishing Eisenhower's principal papers.From this work and discussions with Eisenhower emerged an article critical of Cornelius Ryan's "The Last Battle", which had depicted Eisenhower as politically naîve, when at the end of World War II he allowed Soviet forces to take Berlin, thus shaping the Cold War that followed.