The military has been getting more and more female & minority over the past few decades.
Both groups lean more towards the Democrats.
Based on nothing more than my personal opinion, I would think women/minorities in the military would be more likely than their civilian counterparts to vote Republican; there have been a lot of minorities in the military for decades, and I think they have their act together better than many civilians of any color.
I wonder what anyone in the service felt when Obama’s daughter was parading around (in front of cameras) with a peace sign T-shirt.