Just an update.
I'm playing as the Persian Emperor. So far I gave away just one kingdom to a vassal, Mesopotamia to the sunni caliph, to keep him happy.
Though I'm wildly successful as a conqueror, my vassal is outdoing me: he has conquered all of Cumania, most of Rus, parts of Hungary; and he doesn't seem to be slowing down...
He scares me.
I'm playing as the Persian Emperor. So far I gave away just one kingdom to a vassal, Mesopotamia to the sunni caliph, to keep him happy.
Though I'm wildly successful as a conqueror, my vassal is outdoing me: he has conquered all of Cumania, most of Rus, parts of Hungary; and he doesn't seem to be slowing down...
He scares me.