Military gendering (from Erica)

Today's question is going up a bit late, and I apologize. Here it is, though, regardless: bearing in mind that male hormones have as strong an impact on human behaviour as female hormones do (i.e. testosterone induces aggression just as much as progesterone induces dysthymia), and that socialization has an impact on male and female gendered behaviours, what are some of the advantages or disadvantages to having a predominately male or predominately female military?