This paper presents the driving requirements, results, and user-oriented use cases behind the Enterprise After Action Review (EAAR) prototype. The activity, funded in FY14 by Program Manager Integrated Training Environment (PM ITE), focused on producing a reusable AAR architecture with transferrable technologies and lessons learned for early adoption of the Common Operational Environment (COE) across PM ITE and PEO STRI. At project initiation it was clear the successful execution of a prototype depended on collaboration between the PM ITE team and engineers supporting the Command Post Computing Environment (CP CE) within PM Mission Command (MC). This paper starts by introducing earlier efforts that provided critical insight and software that led to the feasibility of the EAAR prototype investigation using COE constructs. It continues by highlighting common AAR requirements across the training and operational MC community. This sheds light on the potential for AAR system lifecycle cost-savings through shared AAR component development and use across the two communities. The paper then explores the specific COE design constructs and technologies employed as part of the EAAR prototype effort. Finally, the paper concludes with a section on technology transfer progress and a listing of the COE and other standards-based technologies employed and their training or operational MC source.