It's a Paradox game, it's even using a version of the Clausewitz engine the same as CKII and EUIV do so combat will be abstract, it's not what they do, they do political intrigue and empire building, so as Brian said combat will be abstract, I'm currently about 50 years into a Crusader Kings game, and haven't raised levies and fought, but I've gone from being a count to declaring the Kingdom of Wallachia (though now I'm going to have to fight, because my ex Liege, the King of Bulgaria is kind of upset I just nicked a chunk of his Kingdom)