This paper discusses the enrollment of women and homosexuals in the Armed Forces of South American and NATO countries. There are discrepancies in the discussion of this issue in both groups of countries. It seems to be easier for the military to deal with the enrollment of women than to accept the enrollment of homosexuals. The paper conducts a detailed analysis of the development of this issue in Brazil, because this is the country where the writer of this paper has the larger bulk of information and the one that, militarily speaking, is the most important in South America. This is a preliminary study, and some data are lacking, precisely due to the fact that there has not been a widespread academic debate on the issue at hand. However, the purpose of this paper is to encourage discussion, to disseminate previously collected information and to present a number of possible viewpoints.