No need to divide ! Let us analyze it very technically.
Let us imagine that you are UNMARRIED and I am inviting you at my home for dinner !!
I will ask you .. "Hey Indy, is your wife coming with you for dinner?"
Your answer could be "YES" (If you were MARRIED and she was coming with you)
Your answer could be "NO" (If you were MARRIED and she was not coming with you)
Your answer could be "N/A" (If you were UNMARRIED only.)
You can not say NO to my question, as it gives me a feeling that you are married but your wife is not coming with you.
I hope it clarifies. For this particular MILITARY question, If you are saying "NO" I will be suspicious about you. It means you have military history and you have not mentioned about it. Your answer should be NA..
Good luck.. Don't let them divide in a group, unite them.