Franz Halder
Following the war, Gersdorff participated in the work of the U.S. Army Historical Division, in which, under the guidance of Franz Halder, German generals wrote World War II operational studies for the U.S. Army, first as POWs and then as employees. In the late 1940s, Gersdorff authored an operational study on the Wehrmacht response to the Allied Normandy breakout. (The study, together with contributions from Paul Hausser, Heinrich Freiherr von Lüttwitz, Wilhelm Fahrmbacher and Heinrich Eberbach, was published in 2004 as "Fighting the Breakout: The German Army in Normandy from COBRA to the Falaise Gap".)