Kingdoms: Crusades Campaign - campaign difficulty-I'm pleasently surprised

So I gave Kingdoms a whirl recently, thinking it would tide me over until Empire. I expected the same scenario that has occured in every one of my TW campaigns. I have a wee bit of difficulty at the beginning and then I steamroll all the way to total victory.
I decided to play Jerusalem, thinking I would be fighting against hordes of Muslim hosts. At the beginning it was pretty straightforward I took settlements with ease, something that was greatly helped by the fact that I began the game with almost three stacks.
After some boring sieges I decided to take the fight to Egypt, I sent one army there under Prince Guy, assuming that I would defeat the two or three Egyptian armies and be master of the Pyramids. During the first battle I was taught some humility. My army was composed of mostly spearmen, a couple of tripoli squires, crossbowmen and about 3 units of Knights. I was fighting about 2,5 stacks. I managed to deal with the enemy's infantry, but after I charged the reinforcing light cavalry with my templars I realised my mistake.
Much to my dismay not only did my cavalry's charge fail to pulverize the beduins they were actually losing to them. I sent more and more of my cav there with the same result, and the arab cavalry kept coming. I eventually realised I was screwed so I attempted to retreat to my infantry which was also being pounded pretty badly. Somehow I was able to create a semi circle, but with my army decimated by arrow fire and the prospect of another charge I withdrew.
That was the beginning of a pattern, I sent an army it lost I replenished it and won. So far I am in posession of Dumyata and Tanta, I have been sieging both Cairo and the city two the left and both times I've been repelled. I did kill Saladin though. Overall I'm very impressed with this campaign, although I know I could just create two more armies and pulverize them, but where's the fun in that.:laugh4: