I’d expect your military service could help your application stand out and be more interesting to the admissions committee. It would be one of many factors, of course, so assuming you have competitive high school grades and test scores you should have a good chance!
Is your goal to become an officer? If so, you should contact the Naval ROTC program at Villanova.
http://www1.villanova.edu/villanova/artsci/nrotc/prospective_students.html
Good luck!