Marc Bloch specialized in medieval history. In 1929, he and his friend and colleague at the University of Strasbourg, Lucien Febvre, established the journal "Annales d'histoire économique et sociale." It would engender the influential Annales school of history. Bloch fought in the French Army against the German invasion of 1940, and after the army surrendered, he joined the French Resistance and wrote Strange Defeat and The Historian's Craft. He was caught, tortured, and executed by the Germans in 1944.