In 2001, Matt Larsen, then a Sergeant First Class, established the United States Army Combatives School at Fort Benning. Students are taught techniques from the 2002 and 2009 versions of FM 3-25. 150 (Combatives), also written by Larsen. The aim of the regimen is to teach soldiers how to train rather than attempting to give them the perfect techniques for any given situation. The main idea is that all real ability is developed after the initial training and only if training becomes routine. The initial techniques are simply a learning metaphor useful for teaching more important concepts, such as dominating an opponent with superior body position during ground grappling or how to control someone during clinch fighting. They are taught as small, easily repeatable drills, in which practitioners could learn multiple related techniques rapidly. For example, Drill One teaches several techniques: escaping blows, maintaining the mount, escaping the mount, maintaining the guard, passing the guard, assuming side control, maintaining side control, preventing and assuming the mount. The drill can be completed in less than a minute and can be done repeatedly with varying levels of resistance to maximize training benefits.