Hi Alisha, Welcome back to the Disney Parks Moms Panel! A lot of great new experiences have been introduced since your last visit that I know will make this winter visit even more exciting!
First off, let me say a big Thank You to not just your service member, but to your entire family for YOUR sacrifice to our country, too.
I have good news! There IS a Military discount when buying tickets to Mickey's Very Merry Christmas Party. As an Air Force wife myself, I have personally purchased these discounted tickets at the Guest Relations counter at the gate of Magic Kingdom, but all
Guest Relations counters should be able to assist you. (Tickets may be available at the Shades of Green ticket office depending on the party date in question.) Unfortunately these special event tickets are not available for advance purchase at your base Ticket and Travel office.
Mickey's Very Merry Christmas Party pricing and event dates for 2018 have not been released yet, but usually everything is set by August. I also remember not seeing anything official anywhere about how much the discount was, but remember what I paid was at least a quarter off of the listed price. (And pro tip: this event tends to sell out, so stop by a guest relations counter to buy your tickets the day you get in town.)
Oh, you're going to have so much fun at Mickey's Very Merry Christmas Party. I was able to attend this past winter and had the best time - the special fireworks show, meet & greets with rarely seen characters, snacks that were only available during the party (Red. Velvet. Mickey. Waffles.), snow on Main Street U.S.A., and hands down my favorite parade ever.
Thanks again for reaching out to us, and please come back with any more questions you may have!
~Kristen