Level 1
+6% shots per minute for all archers
+10% morale for all units during defensive battles
Level 2
+4% replenishment rate for all units
+12% shots per minute for all archers
+20% morale for all units during defensive battles
Level 3
+8% replenishment rate for all units
+18% shots per minute for all archers
+30% morale for all units during defensive battles