Use the two choke points at the river crossings to gain advantage against overwhelming odds. There are outposts and creep lairs on both sides, and plenty of building space in a richly detailed map.
If playing against AI, recommended for 1 human v 2 AI, or team up with a buddy against 4 AI, with the humans playing on the left.
The landscape suggests "good" factions on the left, as the lush green fields fade to brown and withered landscape as you travel east of the river.