Significant changes in military training are resulting from pressures to cut costs and move training from the schoolhouse to the field so it can be delivered "just in time" and be more responsive to individual unit training needs. Distributed Interactive Simulation (DIS) allows multiple trainees to interact in real time on a common training problem. Intelligent tutoring systems (ITSs) provide instruction on a one-to-one basis. Integrating DIS and ITS technologies offers the opportunity to capitalize on their strengths: the ability to conduct large-scale team exercises while providing each trainee with personalized instruction. A Distributed Interactive Intelligent Tutoring Simulation (DIITS) has been developed to train Army Infantry squad and fire team leaders in the skills to perform military operations cooperatively in urban terrain. The intelligent tutoring system technology allows trainees to receive feedback and remediation regardless of whether a human instructor is present. The technology has the flexibility to be used "on demand" by trainees, not just when scheduled by instructors. The DIITS includes intelligent agent technology to play the role of scenario agents when a human is not available to fill in and gives it added power for use for training any number of trainees. A scenario editor allows users to develop training scenarios and increases the customizability of the technology. The technology is generic and modular to support extension and reuse as training requirements evolve. (YLB)