The Anticipatory Action Simulation Exercise Toolkit and Facilitator Manual provides practical guidance for planning, executing, and evaluating simulation exercises to test and strengthen anticipatory action systems. Developed by the Asia-Pacific Technical Working Group on Anticipatory Action, the toolkit walks users through a four-stage process: organizing, developing scenarios, implementing exercises, and conducting evaluations. The toolkit is primarily designed to support governments and partners to test anticipatory action approaches, learn from real-time decision-making, and refine implementation modalities moving forward.