In 1973 General William F. DePuy, first commander of the U.S. Army’s Training and Doctrine Command (TRADOC), emphasized that it was necessary to expose soldiers to realistic battlefield conditions before they experienced actual combat. Doing this should improve the soldiers’ preparation and thereby, in the long run, their effectiveness and efficiency. DePuy’s belief was widely shared and led to the development of new training methods and a training philosophy that is often referred to as “train as you fight”. Ever since, military training programs have continuously been improved and better shaped towards the real threats that soldiers were facing in the theater. A clear example reflecting the new philosophy was the establishment of the US Combat Training Centers (CTCs). The five pillars upon which the CTC program is based, require (1) that participating units be organized as they would for actual combat, (2) a dedicated, doctrinally proficient operations group, (3) a dedicated, realistic opposing force (OPFOR), (4) a training facility being capable of simulating combat conditions, and (5) a base infrastructure.