Sat Apr 06, 2013 10:18 pm
Command cost is 4 x if a unit is of a different nationality than the general. If you add any Syracusaen general to the stack it should cost only 2 CP again (he doesn't have to lead the army, just be inside the stack).
Alternatively, there are some leaders in game that can lead units of any nationality - they have a trait for that. But I can't remember if any Carthaginian general has that trait.