Can be built on the capital and affects all villages.
Here the officers are trained/instructed better to apply their new knowledge on their respective villages, making the barracks they are responsible for more efficient.
Training time of all infantry is reduced 0,5% per level.
Max Level 20 - Training is reduced by 10%
At level 20:
CP - 70
Cost of last level- around 150k (wood/clay/iron) 50k (crop)
Build time can be similar to Horse Drinking Trough