The FIRST BATTLE simulation system is designed to exercise division commanders and staffs in the control and coordination of combined arms operations. The system is a flexible training tool that can ultimately be applied to any scenario, level of control, or mode of play FIRST BATTLE has undergone extensive field evaluation and incorporates a variety of supplemental and optional features for user adaptation. The three modes of play are conducive to a progressive training program so that once the Open Mode is mastered along with the Basic Rules, optional rules and supplements may be applied to the more sophisticated modes of play-- the Closed Mode and the Command Post Exercise.