I was in the military for 20 years but I often had to hire civilians. I probably hired a few more women than men but statistically I suppose that was to be expected since we had more female applicants. I don't think there is any magic ratio and I never had a preference. I would list the candidates in order of preference based on their resumes and then it would be up to them in the interview to change my mind. The only time gender ever entered my mind was when I was hiring in Muslim countries and was concerned the host country officers would be less likely to work with the women. But I still hired women there when the women were the strongest candidates.