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Research · Defense
Siege Craft
Raises troop attack when breaking a defended wall.
- Entity ID
siege_craft- Branch
- Defense
- Stat buffed
attack— Attack- Bonus per level
- +1.5%
- Maximum level
- 10
- Bonus at maximum level
- +15%
- Power per level
- 85
- Power at maximum level
- 850
- Base study time
- 170 seconds
- Study time at maximum level
- 1h 55m
- Prerequisites
- Fortification at level 5
Cost, time and bonus at every level
Siege Craft runs to level 10, adding +1.5% to attack and 85 power each time. Studying it out costs the four soft resources — the same amount of each — and takes 1h 55m 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 | +1.5% | 85 | 10m 52s | 12,000 | 11 |
| 2 | +3% | 170 | 14m 7s | 15,600 | 15 |
| 3 | +4.5% | 255 | 18m 21s | 20,280 | 19 |
| 4 | +6% | 340 | 23m 52s | 26,364 | 24 |
| 5 | +7.5% | 425 | 31m 1s | 34,273 | 32 |
| 10 | +15% | 850 | 1h 55m | 127,254 | 116 |
Taken from nothing to level 10 that is 7h 42m of raw study and 511,434 of each of food, wood, stone and iron — 2,045,736 resources in total.
Where it sits in the tree
Siege Craft belongs to the Defense branch — the walls line — what an attacker has to get through before they reach your granary. It stays locked until Fortification reaches level 5. Studying it opens 3 further techs.
| Tech | Branch | Requires this tech at level |
|---|---|---|
| Counter-Siege | Defense | 5 |
| Murder Holes | Defense | 5 |
| Siege Engineering | Defense | 8 |
The road here: Weaponry to level 3 → Armor to level 8 → Fortification to level 5 → Siege Craft. That is 3 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 |
| Total before you may begin | — | 442,689 | 6h 17m |
What it eventually opens: 6 studies sit downstream of Siege Craft, counting every remove.
| Study | Steps out | Buffs | At its cap | Study time at cap |
|---|---|---|---|---|
| Counter-Siege | 1 | defense | +12% | 23m 43s |
| Murder Holes | 1 | attack | +12% | 23m 43s |
| Siege Engineering | 1 | attack | +9.6% | 14m 2s |
| Arrow Slits | 2 | attack | +9.6% | 14m 2s |
| Bombardment Doctrine | 2 | attack | +7.2% | 13m 46s |
| Deep Cisterns | 2 | defense | +7.2% | 13m 3s |
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 · Palisades · Stonework · Watchtowers · Moat Works · Battlements · Portcullis · Curtain Walls · Barbicans · Gatehouses · Counter-Siege · Murder Holes · Arrow Slits · Siege Engineering · Concentric Castles · Deep Cisterns · Bombardment Doctrine
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.