Science and technology
Science is a major target, which determines whether a country or nation can get a long development or not. The level of science and technology directly effect the production and other purposes for military affairs. The ability measured by points which are accumulated and updated automatically in Science institute.
Weapon enhancement: strengthen weapon's power of damage and improve its quality
Defense enhancement: strengthen the power of defense of weapons
Development of new supplies: weapons for castle attack, conveyance, wagons.
Construction enhancement: improve the upper limit to grade of constructions