I think small classes and discussions (like in law school) are a different breed than large lectures. My view has always been that if the class is less than 10 or so students, attendance can be required. The students should be given the ability to email for an absence, no questions asked. In these cases, the success of the class is entirely dependent on students attending. If they don't, the class fails.

Military you're trying to teach a hundred things besides just the material, so I think it's really fitting there.