[Urban]

For the last few weeks I have been working on a forum of mine but I think I've got lost or something. I have everything setup and got some content built but I don't know how to advertise. I have gotten a few people to post but that's it. I don't know any sites where to advertise and I don't have enough money to buy ads. The niche is Call of Duty (not general CoD discussion) which appeals to a wide range of audiences. Does anyone here know where I can properly advertise to get my forum out there?

Thank you.