In previous research a pilot simulation was developed for use by Reserve Officers Training Corps (ROTC) units in assessing leadership potential of officer candidates in turbulent-field environments. Peer and instructor rating forms were also developed for evaluation of leadership, decision style, ability to cope with stress, and interpersonal effectiveness. Five objectives were accomplished under the research extension contract reported here: field testing and operationalization of the revised simulation for use on representative ROTC campuses, refinement and preliminary validation of the behavioral style rating scales, development and application of a multimedia training system for instructing faculty in the use of the simulation and assessment battery, and follow-up of the simulation's assessment capability. The final version of the simulation, entitled The Leadership Effectiveness Development Simulation (LEDS), enables participants to develop leadership and interpersonal skills and exhibit realistic and relevant behaviors in these areas for diagnostic purposes. The LEDS can be administered in four 50-minute periods: introduction and initial involvement, the simulation experience, completion and diagnosis, and personal feedback. This report includes a description of the simulation including the setting, physical facilities, roles, simulation operations, scoring and evaluation, leadership diagnosis using the Leadership Description Scale (LDS), and feedback procedure. A list of documents and materials that comprise the LEDS is also included. (JT)