Click to select units. You are the team on the Left. Pressing "C" just selects Cavalry units. Pressing "I" just selects Infantry units. Pressing "A" just selects Archer units. Pressing "F" will cause all units selected to spread out into a line. Pressing "SPACE" will keep All Infantry and Cavalry selected to keep on route and will fire all selected Archers. Works best on a big computer.
You are the Humans, you are fighting the Orcs on the right. Don't let the Orcs get to your king.