I have played all the EU and Ageod games, I still cannot understand the combat system in CKII. I know there is no difference in attacking or defending unless there is terrain. How do my generals select the combat tactic? By the majority troop type in their wing? If there is a link to an indepth explanation of the numbers under the hood, please give me the link. It seems like combat is pretty much just massing numbers. If the numbers are even or close to it, then it seems the generals and special abilites matter. 3k or 4k troops over or under, and it'll break.