Donivan,
First off, THANK YOU for your service and your family's sacrafice!
I'm sure there are a few here who would be most happy to step in and
help teach your wife how to establish dominance over your dog if she's
interested.
Also, I would be happy to put her in touch with Aja Harris of Mutt
Magic,
http://www.muttmagic.com/, Aja is out of Baltimore, but well
worth the travel time for the training she offers and the extended
knowledge of the breed. She helped me begin to work wonders with my
over jealous boy, Angus.
As for suggestions, have her sign on and join if she'd like, because
in order to help her, we'll need your wife to tell us what she's
doing, how the dog is behaving and what problems she's running into.
She'll need to explain what you mean when you say 'the dog is testing
her'.
Keep Safe and God Speed toward home!!
~Kerri & Angus