No Disney does not give discounts to military that I am aware or saw the years we were in California. You can purchase tickets for Disney at the bases ITT offices that are usually very good deal as tax is worked into it. I know the ones in San Diego areas also have vouchers for hotels around Disneyland and you can get some great deals on those as well. You have to call the hotels and find out what ones have openings available for the vouchers and which ones don't.
In years past, YES, Disneyland HAS given discounted tickets to military personnel and their families. They've also given law enforcement and firefighters those discounts, as well. Usually the law enforcement is during the month of Feb. It was a $35 ticket per person for 3 days (up to 5 people, I believe) and the military person got in free for those 3 days, as well.