Armory

Armory represents the military-industrial complex. Here you convert Work (generated automatically) and industry resources into weapons that can then be sold to wars all over the world. This is one of the most important spots in your headquarters and you'll be spending a lot of time here. When selecting production, you can manually create desired weapons or set automatic production: You specify priorities (from 1, most important, to 5) and the game will then automatically convert any existing wood, iron, and coal into as many weapons as possible.

Note that the arquebus and musket become available after turn 100.