Huh? Where you are going to train your troops now?! - Granger upon destroying the Barracks
A Barracks was an essential battlefield structure for all of the factions involved in the GLA conflict.
From the Barracks all infantry were trained for battlefield command. The Barracks also housed medical facilities where injured soldiers could return to be healed back to a battle-ready state. For the USA and China, the Barracks was one of the few buildings that did not require a power plant of some kind to also be in the vicinity. All of the factions could train soldiers to capture buildings if the commander purchased the Capture Building upgrade at the Barracks. Barracks were quite fragile however.