This research aims to guide the design of a serious game inspired by the concepts and resources of wargames to conduct the Course of Action (COA) Wargaming.The Brazilian Ministry of Defense intends to simulate the joint planning process for employing the Armed Forces, applying this simulation to COA Wargaming - an analysis in which each friendly COA developed during this process is contrasted with possible enemy COAs. The military has been applying this analysis in an analog manner, placing and moving their units over a chart or map, deliberating actions, and recording their decisions. Brazil lacks a digital system for conducting COA Wargaming, and countries that do possess such systems refrain from disclosing information due to confidentiality concerns. The doctrines that describe this analysis are public, but they lack sufficient information to systematize it. Improving the COA Wargaming as a digital system would enable recording the full dynamics of interactions, configuring different scenarios, and using computational resources to support decision-making. Consequently, military personnel would plan their actions more effectively, assess risks more accurately, and increase the chances of operational success. This research proposes representing the COA Wargaming as an educational wargame to analyze decisions. Wargames are defined as models or simulations of conflicts within a synthetic environment, involving opposing forces, where players make decisions and respond to their consequences.The research contributions include constructors, process models, ontologies, and a digital game prototype for conducting the COA Wargaming.