You can also, being me, try to imagine what the would-be-emperor feels is the right decision, aside from what is the one most likely to win the war. My dragon commander has a touch of idealism, so he wouldn't gladly employ means contrary to his ultimate goals.
People who enjoy doing that normally won't need me prompting them, though; just thought I'd bring it up.
The dwarves don't like me (much), and no wonder: They're not nice. (I'm sure they are nuanced, though, once you look beyond their prominent representative.)