Horn of Command

The Horn of Command allows you to control your hired units in various ways. When you first craft the horn, it will simply be the Horn of Command, but when you right-click with it for the first time, you will be offered the choice of turning it into either the regular Horn of Command or the Horn of Summoning. The first of these will appear in your inventory as "Horn of Command - Halt Units" and allows you to stop your units from doing anything, such as following you. To use the horn, hold the right mouse button as you would with a bow. After a few seconds you will hear the sound of the horn and any units in range will follow the horn's orders. After you have used the horn to halt units, it changes to "Horn of Command - Forward Units" which orders any halted units within range to wake up and behave as normal. The Horn of Command is useful because it allows you to easily control your otherwise uncontrollable armies.

The "Horn of Command - Summon Units" allows you to summon to you all hired units in loaded chunks. This is useful when rallying troops to oneself, and also when travelling. It is best to have both horns in your hotbar when dealing with hired armies, unless you only have one or two units (in which case you're probably fine).

The Horn is crafted from 3 Bronze Ingots