This report provides study results, analysis, conclusions, and recommendations concerning doctrinal implications of Irregular Warfare (IW) as introduced/described in the 2006 Quadrennial Defense Review (2006 QDR) report and the subsequent IW roadmap. Specifically this study identifies current joint doctrinal treatment of IW and its aspects, to include content of ongoing revision efforts; identifies any joint doctrinal voids concerning IW and proposes courses of action for resolving identified voids; and identifies terminology implications/doctrinal issues related to IW.