Research new steel grades

Research new steel grades is an upgrade in Cossacks 3, available at the Academy.

Background
Metallurgy was actively developed during the 17th and 18th centuries. New steel grades were invented in order to improve weaponry. At the same time, metalworking methods were perfected. As a result, cold steel weapons became more effective and less expensive.

Effect

 * 18c musketeer/grenadier melee attack efficiency +25%