Peterson Air Force Base is just bursting with military history. If this interests you, find out about any group tours and one-off happenings.
You'll have sightseeing choices galore when in Colorado Springs. Peterson Air Force Base is an ideal place to start here, but there are many other worthwhile spots to explore. United States Olympic Complex, Broadmoor World Arena, and The Citadel Mall are not far from the military installation and will fill in your day nicely.