What document summarizes the results of an assessment after a mission?

The After Action Report (AAR) is the correct choice because it is specifically designed to capture and summarize the results of an assessment made after a mission. AARs are critical tools in military operations, providing a structured way to review what occurred during an exercise or mission, identify what went well, what did not, and what could be improved in the future. This post-mission evaluation fosters learning and accountability, ensuring that both successes and failures are documented for future reference.

While the Mission Report provides pertinent information about the execution of a mission, it primarily focuses on operational details rather than comprehensive assessments. The Debriefing Document is more focused on the immediate sharing of experiences and observations from the mission, serving as a precursor to more formal reports. The Operational Summary, on the other hand, typically provides an overview of ongoing operations rather than a reflective analysis of a completed mission. Thus, the AAR stands out as the most fitting document for summarizing and analyzing mission outcomes.