Dress up a little, but don't do the "sleazy" thing. I am an army wife, and I know a few that dress that way, and all it does is tick the other wives off because the ones that dress sleazily are the ones who are just looking for attention. When my husband graduated from boot camp, I wore a pair of jeans, heels, a pretty white tank top (that covered my breasts fully) and I had my hair and nails done. Benefits from dressing pretty, not slutty, are that the other wives/girlfriends will appreciate it and your boyfriend will be proud to have you by his side, and he won't mind introducing you to his battle buddies and his superiors.