Ok world:
You say there is a battle field so what type? Barren lands? or middle of a city somewhere? In a desert or a normal urban setting? What era do you want this to be in, i.e. past present, future?
Posting:
Yeah there has to be other wise it could died out quick but also that could mean if people got writers block and others were waiting on that persons character response, could get stuck very quickly. But I think the limit should be something doable, like a paragraph possible 3-4 lines minimum. That sound good to you?