I got this information from the USAA VA Loan FAQ page. It has some pretty helpful resources for you on there. :-)
"A good resource for determining if you qualify for a VA loan is the U.S. Department of Veterans Affairs' website http://www.benefits.va.gov/HOMELOANS/purchaseco_eligibility.asp. In general, to qualify for a VA loan, you must have been discharged under conditions other than dishonorable and meet certain service requirements."
Let me know if you have any other questions!