The objective of this project was to develop and evaluate simulation techniques for training small unit leaders which would provide maximum tactical decision-making training while minimizing the unnecessary, and often wasteful, participation of lower level troops. The fundamental approach of this research effort has been to take some of the basic instructional principles underlying engagement simulation and to develop abstractions of field exercises for leader training. Initial efforts led to the development of a mapboard game. The 'board game' initially developed was a two-sided, free-play map exercise for teaching infantry tactics to small unit leaders at the platoon level. As originally conceived, junior officers could play the game to develop tactical skills which they would subsequently apply during REALTRAIN exercises with troops. The products of this research have been: (1) an infantry squad/platoon level game for two-player or multiplayer use; (2) an infantry squad/platoon level field opposition exercise, and (3) a combined arms platoon/company level mapboard game. This report contains documentation of the infantry squad/platoon level field opposition exercise.