This study analyzes the historical debate between the Army and Air Force over the issue of close air support (CAS). Specifically, this thesis examines four CAS sub-issues from World War I through the Korean War: priorities in the employment of airpower, the ownership and apportionment of CAS assets, the most effective CAS command and control (C2) system, and the debate over whether to procure a single- or multi-purpose CAS aircraft. A fundamental...