The Table of Command is a unit-hiring-related utility block.
The purpose of this item is to allow you to assign your horns and swords of command to certain squadrons, allowing you to subdivide your hired forces into different groups for different purposes, and control each group individually.
To assign an item to a squadron, right-click on the table while holding a horn or sword of command. In the text box, write the name of your squadron. This command item will now command all and only units which are assigned to that squadron.
To assign troops to a squadron, right-click on them and select "Command". You will see another text box: write the name of the squadron in it. This hired unit will now only respond to commands from command items assigned to the same squadron.
You can also set the squadron of a hired unit in the Unit Hiring screen, before actually hiring the unit. This allows you to hire many units at once and automatically assign them all to a squadron.
The crafting recipe is three paper on top, three of any kind of wooden plank in the middle, and three bronze ingots on the bottom. This is done on a regular crafting table.