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Research · Military
Battle Drums
A cadence that steadies green recruits — raises training speed further still.
- Entity ID
battle_drums- Branch
- Military
- Stat buffed
train_speed— Train speed- Bonus per level
- +1.2%
- Maximum level
- 10
- Bonus at maximum level
- +12%
- Power per level
- 76
- Power at maximum level
- 760
- Base study time
- 35 seconds
- Study time at maximum level
- 22m 26s
- Prerequisites
- Muster Rolls at level 8
Cost, time and bonus at every level
Battle Drums runs to level 10, adding +1.2% to train_speed and 76 power each time. Studying it out costs the four soft resources — the same amount of each — and takes 22m 26s 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 train speed | Power | Study time | Each resource | Gems to finish |
|---|---|---|---|---|---|
| 1 | +1.2% | 76 | 35s | 3,000 | 50 |
| 2 | +2.4% | 152 | 53s | 4,200 | 70 |
| 3 | +3.6% | 228 | 1m 19s | 5,880 | 98 |
| 4 | +4.8% | 304 | 1m 58s | 8,220 | 137 |
| 5 | +6% | 380 | 2m 57s | 11,520 | 192 |
| 10 | +12% | 760 | 22m 26s | 61,980 | 1,033 |
Taken from nothing to level 10 that is 1h 6m of raw study and 209,400 of each of food, wood, stone and iron — 837,600 resources in total.
Where it sits in the tree
Battle Drums belongs to the Military branch — the offence line — what your swords, horses and bows hit for. It stays locked until Muster Rolls reaches level 8. 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 5 → Drilling to level 8 → Muster Rolls to level 8 → Battle Drums. That is 4 studies standing between a fresh Academy and this one.
| Prerequisite | Level required | Each resource | Study time |
|---|---|---|---|
| Weaponry | 3 | 13,080 | 12m 40s |
| Armor | 5 | 32,820 | 35m 10s |
| Drilling | 8 | 103,140 | 2h 3m |
| Muster Rolls | 8 | 103,140 | 24m 39s |
| Total before you may begin | — | 252,180 | 3h 15m |
Related
Guide: Research & the Academy · Research Priorities. Studied at the Maester's Academy. Index: all 66 studies · the whole database.
Rest of the Military branch: Weaponry · Armor · Drilling · Swordsmanship · Archery · Marksmanship · Spearwork · Blacksmithing · Forged Steel · Shieldwork · Infantry Discipline · Tempering · Ironclad Mail · Horsemanship · Cavalry Tactics · Warhorses · Muster Rolls · Quartermastery
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.