Armory weapon upgrades affect all human soldiers, Heroes and ships: those trained at the Academy, Barracks, Military Barracks, Counter Barracks, Longhouse, Dock, Migdol, Fortress or Hill Fort. They do not affect myth units or siege weapons. All attacks are affected, including hand-to-hand hack attacks, ranged pierce attacks, and even ranged hack attacks, such as that of the Throwing Axeman. 

Raw copper was the first metal utilized by man because it was occasionally found in a relatively raw state on the Earth’s surface. It had a relatively low melting point and could be worked and hammered into usable shapes. When humans discovered how to melt it and mold it, they were able to make the first cast metal objects. Most important of these were knives for work and war. Copper weapons were superior to stone weapons in almost everyway, but especially in being less fragile.