Flight simulators are being used to an ever greater degree to train combat related skills. The Air Force Human Resources Laboratory (AFHRL) has been tasked with determining the effectiveness of simulator training and providing guidance as to how to train for combat in a simulator. In order to provide these answers, high fidelity, realistic combat simulation must be accomplished. Using the Advanced Simulator for Pilot Training (ASPT), techniques have been developed for the generation of realistic combat environment scenarios. These techniques were used to develop an environment that closely models the Tonopah range at Nellis AF8, Nevada, a range that is often used for REDFLAG exercises. Advanced database modeling techniques were used to create the geographical features, cultural features, and provide low-level cues utilizing the maximum capability of the ASPT image generating system. The environment had numerous threats including surface-to-air missiles and anti-aircraft artillery. The pilot could interact with this environment in the-same manner that he would interact with a real combat environment. Through the use of Radar Homing and Warning System (RHAWS) and the visual environment, the pilot could determine the location of potential threats and targets. The pilot could attack and destroy any target or threat within the environment and he could be "killed" by any threat. The environment simulation techniques that have been developed are very flexible and therefore the REDFLAG simulation can be quickly adapted to provide new scenarios.