Home · Database · Research · Bombardment Doctrine
Research · Defense
Bombardment Doctrine
Engines massed and ranged as a single battery — raises troop attack when breaking a wall.
- Entity ID
bombardment_doctrine- Branch
- Defense
- Stat buffed
attack— Attack- Bonus per level
- +1.2%
- Maximum level
- 6
- Bonus at maximum level
- +7.2%
- Power per level
- 106
- Power at maximum level
- 636
- Base study time
- 58 seconds
- Study time at maximum level
- 13m 46s
- Prerequisites
- Siege Engineering at level 5, Arrow Slits at level 5
Cost, time and bonus at every level
Bombardment Doctrine runs to level 6, adding +1.2% to attack and 106 power each time. Studying it out costs the four soft resources — the same amount of each — and takes 13m 46s for the final level alone. Gems are only ever the optional instant finish; the study itself is bought with what your fields already make.
| Level | Total attack | Power | Study time | Each resource | Gems to finish instantly |
|---|---|---|---|---|---|
| 1 | +1.2% | 106 | 3m 42s | 12,000 | 4 |
| 2 | +2.4% | 212 | 4m 49s | 15,600 | 5 |
| 3 | +3.6% | 318 | 6m 16s | 20,280 | 7 |
| 4 | +4.8% | 424 | 8m 8s | 26,364 | 9 |
| 5 | +6% | 530 | 10m 35s | 34,273 | 11 |
| 6 | +7.2% | 636 | 13m 46s | 44,555 | 14 |
Taken from nothing to level 6 that is 47m 16s of raw study and 153,072 of each of food, wood, stone and iron — 612,288 resources in total.
Where it sits in the tree
Bombardment Doctrine belongs to the Defense branch — the walls line — what an attacker has to get through before they reach your granary. It stays locked until Siege Engineering reaches level 5 and Arrow Slits reaches level 5. Nothing further in the tree depends on it, so it is a leaf: worth taking for its own bonus, never as a stepping stone.
The road here: Weaponry to level 3 → Armor to level 8 → Fortification to level 5 → Siege Craft to level 8 → Siege Engineering to level 5 → Bombardment Doctrine. That is 5 studies standing between a fresh Academy and this one.
| Prerequisite | Level required | Each resource | Study time |
|---|---|---|---|
| Weaponry | 3 | 47,880 | 40m 47s |
| Armor | 8 | 286,292 | 4h 3m |
| Fortification | 5 | 108,517 | 1h 32m |
| Siege Craft | 8 | 286,292 | 4h 19m |
| Siege Engineering | 5 | 108,517 | 20m 13s |
| Total before you may begin | — | 837,498 | 10h 56m |
Related
Guide: Research & the Academy · Research Priorities. Studied at the Maester's Academy. Index: all 81 studies · the whole database.
Rest of the Defense branch: Fortification · Siege Craft · Palisades · Stonework · Watchtowers · Moat Works · Battlements · Portcullis · Curtain Walls · Barbicans · Gatehouses · Counter-Siege · Murder Holes · Arrow Slits · Siege Engineering · Concentric Castles · Deep Cisterns
Every figure above is generated from the shipped game code — the same constants and formulas the running game uses — and regenerated whenever the balance changes. Nothing on this page is hand-typed.