Military Engineer

-2% upkeep for all land units (parent army)
+2% attack range for all siege weapons (parent army)
-3% construction costs (local province)
-5% siege unit recruitment costs (parent army)

-2% upkeep for all land units (parent army)
+4% attack range for all siege weapons (parent army)
-6% construction costs (local province)
-10% siege unit recruitment costs (parent army)

-2% upkeep for all land units (parent army)
+6% attack range for all siege weapons (parent army)
-9% construction costs (local province)
-15% siege unit recruitment costs (parent army)