It seems like the snare in the background is slightly off-beat, maybe like the drumroll was hesitated for a little too long. Also, a little more variance in that realm might be good, as military snares do not tend to be overly repetative and as simple as that. Maybe add in a couple flams and sixteenth notes in between, and try changing it up every two or four bars at least (just minor variances, really). I'm no pro, but those are the things I could pick out, but I would like to say that it sounds very professional, like something you'd hear on the menu of a Call of Duty game.