During his convalescence, from 1911 to 1913, Haushofer would work on his doctorate of philosophy from Munich University for a thesis on Japan titled Dai Nihon, Betrachtungen über Groß-Japans Wehrkraft, Weltstellung und Zukunft ("Reflections on Greater Japan's Military Strength, World Position, and Future"). He established himself as one of Germany’s foremost experts regarding the Far East, and co-founded the geopolitical monthly Zeitschrift für Geopolitik (ZfG), which he would co-edit until it was suspended towards the end of World War II.[1]