This article describes how researchers work with military to create the next generation of training technology. This article also describes the features of Flatworld, a virtual military training technology. Flatworld is one of many projects under development at the Institute for Creative Technologies, a research group that is supported primarily by the U.S. Army. At ICT, as the institute is called, researchers in simulation, language-recognition, and animation technology work with people from the entertainment industry to devise new, realistic methods for training soldiers using virtual reality. These are the high-tech dress rehearsals for future theaters of war.