I have three questions regarding RoP:
1) According to the discription of the multinational commander trait, there is a malus if units of a different nationality are commanded by a leader who doesn't have the trait. How big is this malus?
2) This one is going to sound dumb: Does siege artillery participate in field batlles or just in the defense of/assault on forts and cities?
3) Is there a limit to the number of artillery in a stack that can participate in a battle (with obvious consequences for stack composition)? I am aware that depending on the terrain the frontage becomes smaller (meaning fewer units can engage in a battle). Looking at the battle reports, however, I usually get the feeling that most of my guns did engage.