As a young soldier I learned of the A.C.E Guide for the Evaluation of Service Schools.
Here is a link to the internet version:
http://www.acenet.edu/AM/Template.cf...ContentID=8754
For many service schools with an academic component there is a recommendation for college credits. Note that this is only a recommendation, and each college or university is free to accept or reject the recommendations, to require additional requirements, or to limit the amount of such "non-traditional" credits.
Between service school credits (O.C.S., Combat Engineer NCO School, Special Forces Officer's Course) and credit by examination only (C.L.E.P. and related tests) I was able to get a two year head start on my college degree.