Complex sentence: Invading Armies differ from later games as well, in that Barbarian towns exist within many provinces from which Barbarian armies can eminate, these are converted to Roman towns through invading them and defeating the inhabitants.
Split into simpler sentences: Invading Armies differ from later games as well, in that Barbarian towns exist within many provinces from which Barbarian armies can emanate. These are converted to Roman towns through invading them and defeating the inhabitants.