San Diego has long been an important cog in the U.S. military wheel, below are some ways to experience pieces of it.

The Marine Corps Recruit Deport (MCRD) San Diego has the MCRD Command Museum on the base that the public can visit and attending a graduation ceremony, the day the recruits become real Marines, is a very moving experience.

http://www.corpshistory.org/

http://www.mccsmcrd.com/Graduation/in...

A day trip to San DIego could include those, a visit to Liberty Station, the former Naval Training Center that retains to look from when it was a Navy base. There are still anti-aircraft guns in place. See below.

…wordpress.com/2011/05/dsc02584.jpg

And the USS Recruit.

…marriott.com/propertyimages/…

And march through Preble Field as generations of US sailors did.

…wikimedia.org/wikipedia/…2C_1961.jpg (Preble Field NTC in 1967)

And then hit the USS Midway Museum. From the flight deck of the USS Midway you get view of Naval Station Coronado and North Island Naval Air Station.

http://www.midway.org/

And time allowing you can drive through Fort Rosecrans which contains Fort Rosecrans National Cemetery on the way to the Cabrillo National Monument that overlooks Naval Station Coronado, North Island Naval Air Station, Naval Base Point Loma (submarine base) and down to Navy Base San Diego on clear days.

http://goo.gl/maps/WZPJQ