Quote Originally Posted by Gertgregoor
Don't you need a correct MIC for them to be usable. Playing as Hayasdan I can't use Seleukid MICs, Or am I doing stupid things again?
That's correct. If you right click on the MIC it will tell you which factions can share it. Seleukid share a factional MIC with Ptolemaioi and a regional MIC with Ptolemaioi and Baktria. Destroying them gives you extra cash, and prevents them from immediately recruiting units should they retake the city.