Mount&Blade/Rhodoks

The Rhodoks are an unusual faction; whereas the Khergits are cavalry-focussed the Rhodoks have only infantry and crossbowmen. Their spearmen have a combat advantage against cavalry but are only moderately useful against other infantry.

Against cavalry
If you have a mixed array of rhodock troops, then the best thing to do is to order your infantry ahead of your crossbwman, on a hill this works much better, and as the cavalry approach, they will be knocked down by the heavy fire of crossbow bolts. Meanwhile, your rhodock infantry will have a very good chance in taking down the infantry without a problem, unless of course you are fighting a bunch of hired blades, with only a handful of spearmen.