The Driver’s specialty is handling armored equipments. Therefore, they acquire ranger’s general abilities before they use any armored equipments. In other words, you can play as ranger for some time and obtain a drivers license when you get promoted. Although every soldier in the union uses armored equipments, the Drivers have the greatest talent and can handle them better than anyone.
The Craftsmen are suppliers who specialize mining, processing, manufacturing, and upgrading. Hence, they are usually assorted as a non-fighter, and can lead the game with great economic foundation.
