This study, based on primary sources, shows that the army's role in the wartime mobilization of the industry was fundamental and extensive. It determined aircraft prices and labor exemptions, regulated the industry's supply of credit and raw materials, limited patent rights, and ultimately interfered in management-labor relationships. Its policies resulted in the industry's expansion and concentration and in above average real wages for the industry's labor force. The article concludes that while the mobilization of the aircraft industry was successful, military regulation of the German war economy in World War I was generally inefficient.