In the FAQ it says this:
The questions on your site say a lot about the community. To attract experts, you need a site where people are asking very interesting and challenging questions, not the basic questions found on every other Q&A site. Your goal is to make it clear that this is a professional site.
I want to create a stack exchange about military thing. But experts won't ever actually show up to be asking questions or look for answers on this type of stack exchange. Because they have far better sources than anything the internet has to offer. So would a stack exchange about military topics be ruled out because of this?