The use of Combined Arms, a very important set of tactics, techniques, and procedures to the Marine Corps, is complex and requires considerable practice and training of the entire Combined Arms (CA) team. Simulations exist and are being developed that provide a practice and training environment for the Combined Arms team. However, for effective training to occur, use of simulations requires intelligent evaluation and feedback. Furthermore, as practice develops the skills of the team and prepares it to handle more difficult scenarios, additional training scenarios should become more and more complex and realistic. A CA training opportunity was identified and addressed through the development of an Intelligent Tutoring System (ITS). The issue was that no simulation existed which provided intelligent feedback to the Fire Support Team (FiST) as to the correctness of their CA plan. This prevented them from receiving enough practice and training in important aspects of this planning process which impacted the quality of Combined Arms Exercise (CAX) training opportunities. Therefore an ITS which could evaluate and provide feedback on the FiST developed CA plan was developed. This paper first covers the training needs for CA and the FiST then discusses ITSs generally and how their capabilities meet the identified needs. The development methodology used for this project is described. The functional capabilities of the ITS are discussed followed by the underlying architecture that implemented those capabilities. The paper finishes with results, lessons learned, and future work.