"Centralize all your Mercenary Hirings! Helps you in Mercenary hiring process and controls all your Hiring Quarters, forwarding your Mercs to whichever quarter is available once in the queue!"
When you build the Central Hiring you don't have to manage your 5 Hiring Quarters individually anymore. You control all hiring at one place. Even when you click on a Hiring Quarter you will still open the Central Hiring. You will need City Center level 3 and 3 Hiring Quarters level 2 to be able to build you Central Hiring
All your hiring activities in one place. The top slots are the active hiring, to lower slots are for the hiring in queue. "note: you will lose 8 hiring slots when you build the Central Hiring"