Ron Paul gets the most in donations from the military. Overwhelmingly.

"Paul received at least $95,567 from military donors between January and September of last year, the most recent data available, according to the nonpartisan Center for Responsive Politics. That’s nearly seven times what Mitt Romney and Rick Santorum, who edged out Paul in Iowa, collected from military donors combined."

http://www.washingtonpost.com/national/promising-to-bring-all-troops-home-ron-paul-campaign-pulls-in-cash-from-military-donors/2012/01/06/gIQA9IkVfP_story.html?tid=pm_national_pop