In 2000, OSPT replaced Undergraduate Space and Missile Training (USMT). OSPT continued USMT’s legacy of preparing personnel for follow-on training in the space and missile operations career field by providing instruction in the fundamental knowledge areas and skills associated with space and missile operations. Under the OSPT format, instructors became subject matter experts in multiple operational and functional areas, thus broadening their knowledge of space assets and enabling them to teach the entire course to a single class and mentor the future operators throughout their training. But OSPT had an even shorter life than USMT, being replaced by the Space 100 course in 2004.