Tom,
After countless PCS moves in over 20 years I have not had to experience what you are going through. I had a MSgt that worked for me,just last year fall into this same predicament. There is a program by the called the DOD Homeowner's Assistance Program (HAP). Unfortunately for him it did not work out as it took too much time as his orders were immediate but it is something you could look into.
Here is the website I found on the google search:
http://hap.usace.army.mil/Things to consider as some have mentioned:
1. Perhaps you can rent it out while you are stationed in Germany
a. If your base has a housing office check with them for listing it for free
2. There is a possibility that your lender MAY allow you to change your payments (worth a look)
3. You could sell the house
4. Check out your Airman & Family Readiness center (If USAF, probably called something diff if you are in another service) and see if they have any advice or assitance
If you are forced to sell and end up in a short sale or foreclosure situation (God forbid), be advised that a foreclosure can have not only serious credit implications (as well as a Short sale) but may also affect your security clearance. The troop that worked for me made some calls to the security folks and they said that entering into foreclosure would adversely hurt his clearance but a short sale would not. (Make sure you look into this as things have probably changed over the past 18 months or so).
Best of luck to you buddy and I am sorry to hear of your situation.
Regards....