The proposed dissertation will investigate the unprecedented deployment of U.S. military officers in an extraordinary range of non-traditional international affairs assignments between America's 1917 entry into World War I and 1920 in the wake of its rejection the Treaty of Versailles. These countless American military officers both enacted what had come by 1920 to be called "the new philosophy," as well as instantiated the inaugural occasion of American military internationalism, a direct product of efforts to help stabilize a perilously unstable wartime and postwar Europe.