After-Action Review

An After-Action Review (AAR) is a structured reflection process used to capture lessons from a completed activity—whether a military operation, a diplomatic negotiation, a crisis simulation, or a Model UN conference. The format originated in the U.S. Army during the 1970s as a training innovation at the National Training Center and has since been adopted across humanitarian agencies, think tanks, corporate teams, and government ministries.

A traditional AAR is organized around four questions:

• What was supposed to happen? (the plan, mandate, or objectives)
• What actually happened? (the observable facts)
• Why were there differences? (analysis of causes, not blame)
• What should we sustain or improve? (concrete lessons and actions)

The review is typically led by a facilitator rather than the senior person present, and ground rules emphasize candor over hierarchy. AARs can be formal—scheduled, documented, and circulated as a written report—or hot, conducted informally within minutes of an event while memories are fresh.

For IR students and junior researchers, AARs are a practical tool after policy simulations, crisis exercises, or fieldwork. UN peacekeeping missions and OCHA-led humanitarian responses use comparable lessons-learned mechanisms; NATO refers to its variant as the Joint Analysis and Lessons Learned process. Think tanks such as RAND have published extensively on AAR methodology since the 1990s.

For Model UN delegates, a post-conference AAR with a delegation might cover bloc strategy, speech delivery, resolution drafting, and chair management. The value lies less in producing a polished document than in surfacing tacit knowledge that would otherwise be lost when team members rotate out. Effective AARs separate observation from judgment, focus on systems rather than individuals, and translate findings into specific changes—revised briefing templates, new training modules, or updated standard operating procedures—rather than vague resolutions to "do better."