The expansion sounds very awesome!
I had this epic battle the other day. I was trying to siege this Vaegir castle, with only like 50 men (most of them vets though). While I'm waiting for the next day to come, KING YAROGLEK comes out of nowhere and attacks me with like 150 men. I was hopelessly outnumbered obviously but figured putting up some sort of fight was better than nothing. Best tactic I find is to form up your foot and archers, and then lead your cavalry around to strike the enemy in the flanks. It seems to drive them into a bit of confusion, and ties their archers up so you can then order your foot to charge them. I can beat enemy armies twice my size with this technique, provided they don't have too many horsemen or veteran troops. I employed this against Yaroglek, and we had a pretty EPIC BATTLE. I have my battle size changed to support 200 so pretty much everyone was on the field from the start. In the end, EVERYONE except me, a few of my knights, Yaroglek, and a few of HIS knights, were dead. My horse was dead. We ended up fighting a tense little battle on the summit of a hill, and in the end, Yaroglek cut down the last of my knights. it was just ME AND HIM and it was pretty cool, like BRAVEHEART or something. I actually lost in the end, Yaroglek had a horse and I didn't and we sparred for awhile but he caught me with a lucky blow and I went down.
WHY SO SERIOUS HAHAHAHHAHAAHAHAHAHAHAHHAHAHAHHAHAHAHAHAHAHAHAHHAA