Research

AgricultureEach upgrade adds 10% to food production.

LumberingEach upgrade adds 10% to lumber production.

MasonaryEach upgrade adds 10% to stone production.

MiningEach upgrade adds 10% to iron production.

Metal CastingEach upgrade lowers production time of mechanics by 10%.

InformaticsThe higher its level, the more detailed information you gain from scouting and beacon tower.

Military ScienceEach upgrade lowers training speed by 10%.

Military TraditionEach upgrade adds 5% to army attack.

Iron WorkingEach upgrade adds 5% to army defense.

LogisticsEach upgrade adds 10% to your army's load capacity.

CompassEach upgrade adds 10% to infantry moving speed.

Horseback RidingEach upgrade adds 5% to the speed of cavalry and mechanics.

ArcheryEach upgrade adds 5% to shooting range.

StockpileEach upgrade increases warehouse capacity by 10%.

MedicineEach upgrade adds 5% to your army's life.

ConstructionEach upgrade lowers construction time of buildings and fortified units by 10%.

EngineeringEach upgrade adds 10% to wall and fortified units endurance.

MachineryEach upgrade adds 100% to the repairable rate of fortified units.

PrivateeringEach upgrade decreases your rivals warehouse protection by 3%.