Make it not 40 people being privates and one person being the general (typically the host)
When I've joined these Military roleplays all I see is one person bossing around a giant group of idiots, telling them to do stupid things like "GO EAT NOW FOLLOW ME OH NO YOU LOOKED AT ME FUNNY BANNED NOW DO THIS STUPIDLY BUILT OBSTICLE COURSE."
Seriously. That's loving bootcamp for the lame.
If you want to make a realistic military roleplay, add things that the Military actually DOES. Create a desert and a town and go in groups with Helicopter drop offs and afghanistan rebels and all of the works. Then have a home base be for some training and resupply. Don't focus on just bossing people around until they rank up. which is another thing. don't hand out ranks to idiots, if you even use ranks.
