So, this whole army thing is kind of a bummer. I know that maybe it seems odd to have a Ruler as just a rank and file member of an army, but as armies are the primary mechanism for coordinating large groups of nobles in a war (and by far the most heavily used), I think it's rather important that a ruler have the ability to join one. Besides, what if he wants to be a Marshal too? Plenty of Rulers who were great war leaders in history.
I don't know about my fellow Rulers, but I very much want to be in my realm's army so that I get orders and can participate in the war. Can we have a 'join army' button? Pretty please?