Infantry and Cavalry Upgrades
 

Design bayonet: barrel-inserted, bayonet with a tube

At the end of XVII century, infantry weapons underwent multiple changes having an impact on the structure of infantry detachments. Introduction of barrel-inserted and subsequently tube-fixed bayonets allowed abolishing pikemen at all. Bayonet was invented in France in 1640s and was added to armories in 1699 after multiple improvements. So pikes disappeared from armies, followed by abolishing all types of armor.