It's one thing coming up with and putting together a small skirmish but totally another to create an entire epic battle on par with Lord of the Rings or Game of Thrones even when taking it from the point of view of a single character but as with all things it's a peace of cake when broken down in to smaller bits. What position are they in, have they taken a vantage point to wait for their perfect moment or for orders? What can they see, how do the feel, are they scared? If not why? Who or what are they fighting for? How many armies are involved is it one side against another or is it a clash of five armies? Do they stand alone in the fight, are they just there for their own reasons?