I'm looking for a Free 3d MMO, I have more details that just won't fit here. so read inside my question.

I want one that is sort of military but kind of fantasy too. More like a squad based game, with swords and axes and stuff, If you know any that are good hit me with a list, I would also like the graphics to be good but I'm not picky. But mainly just if you don't cooperate with the community then you don't progress. And a relatively easy to understand UI. Any one know anything?