Level 1
+5% income from looting settlements
+10% morale for all units during battles in foreign territory
Level 2
+10% income from looting settlements
+8% melee attack skill for all units
+20% morale for all units during battles in foreign territory
Level 3
+15% income from looting settlements
+16% melee attack skill for all units
+30% morale for all units during battles in foreign territory