I've noticed that subject loyalty can fluctuate wildly, going from 40 to 0 in a blink. When it drops to 0 it is usually from a modifier called "power realtive to overlord", which will be usually -40 to loyalrty. So I re-read the wiki part about subject loyalty. One of the factors mentioned is "relative size of it's army", does anyone know exactly how this works? Does it only count on legions and raised levies? Btw, I saw there was a 3 year old post about this, but I guess there have been some updates, since then.