Just that, maybe some watch towers here and there for the snipers and maybe 1 or 2 little outposts to hold attacks, but the sooner the better

That's not a flat map though. So do you instead want something like that? And do you want it to be a vehicle/weapon testing map, or a serious one?

Well, maybe like a gm_disten, with many displacements for intense tank warfare, and of course the huge sky for aircraft.

You sure you want a flat map? What could you do with it? What should I add to it to make it fun? I think that obstacles in the terrain is a big chunk of real warfare. Do you want it as a vehicle/weapon testing map?

waiting for flattest map