Game rules
Troop upgrades
The Blacksmith improves the attack of the units, the Armoury their defence. Each unit has its own upgrade level in each village, from 0 to 20.
- An upgrade cannot go above the level of the building. Costs grow at every level; a higher building cuts the time.
- In attack the upgrades of the village the troops leave from count; a conquered village loses its upgrades.
The formula
B + (B + 300 × C ÷ 7) × (1,007L − 1)
- B: base attack of the unit, or its defence against infantry and against cavalry
- C: crop upkeep of the unit
- L: upgrade level
Each level multiplies the bonus by 1.007: at level 20 a unit gains about 15% of B plus 300 × C ÷ 7, so units with more upkeep gain more.
- In spying missions scouts count 35 in attack and 20 in defence, upgraded with the same formula.
- Ram and catapult upgrades also increase their damage to walls and buildings.
Example: 
Legionnaire
| Level | |
|
|
|---|---|---|---|
| 0 | 55 | 75 | 75 |
| 1 | 55,70 | 75,80 | 75,80 |
| 5 | 58,50 | 79,20 | 79,20 |
| 10 | 62,10 | 83,50 | 83,50 |
| 15 | 65,80 | 88 | 88 |
| 20 | 69,70 | 92,60 | 92,60 |
See also: Blacksmith Armoury Catapult targets
Values for the Babylon server: speed x10, troop speed x5, production x4. Times are those with the building at level 1. Server Settings