The U.S. Marine Corps has an opportunity not only to adopt wargaming best practices, tools, and approaches from other sources but also to adapt and develop them further to suit its own needs. This report is designed to help the Marine Corps understand the utility of different wargaming tools as the service invests in its wargaming capability and in building its next-generation wargaming concept. The authors have collected information on wargaming processes, facilities, and skill sets through research and interviews at various wargaming centers. They identify tasks by wargaming type in order to provide information on when in the wargaming process certain tools might be useful. The authors make recommendations for low-, medium-, and high-resourced courses of action (COAs), with the COAs meant to build on each other rather than representing choices between discrete options. The low-resourced COA involves actions that can be implemented with minimal resources and relatively quickly, focusing on improving processes and the wargaming skills of staff already engaged. The medium-resourced COA builds on the previous one, featuring recommendations that require more resources, time, and research and that involve a greater degree of uncertainty, focusing on acquiring additional skill sets, personnel, and equipment. The high-resourced COA builds on the two previous COAs and requires major reorganization or changes in policy or actions of inherent high complexity and financial commitment, focusing on the construction of new and specialized wargaming facilities.