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
- 7m 20s
- 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 7m 20s 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 |
|---|---|---|---|---|---|
| 1 | +1.2% | 106 | 58s | 3,000 | 50 |
| 2 | +2.4% | 212 | 1m 27s | 4,200 | 70 |
| 3 | +3.6% | 318 | 2m 11s | 5,880 | 98 |
| 4 | +4.8% | 424 | 3m 16s | 8,220 | 137 |
| 5 | +6% | 530 | 4m 54s | 11,520 | 192 |
| 6 | +7.2% | 636 | 7m 20s | 16,140 | 269 |
Taken from nothing to level 6 that is 20m 6s of raw study and 48,960 of each of food, wood, stone and iron — 195,840 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 | 13,080 | 12m 40s |
| Armor | 8 | 103,140 | 2h 11m |
| Fortification | 5 | 32,820 | 35m 10s |
| Siege Craft | 8 | 103,140 | 2h 19m |
| Siege Engineering | 5 | 32,820 | 7m 42s |
| Total before you may begin | — | 285,000 | 5h 26m |
Related
Guide: Research & the Academy · Research Priorities. Studied at the Maester's Academy. Index: all 79 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.