In Blizzard real-time strategy games, you must click on a building before building a unit. If you have two barracks, the unit you build will emerge from the barracks you queued it in.
In Command & Conquer 3, units are built from an ever-present bar at the side of the screen. If I have multiple barracks and I build a unit from the side bar, how do I know which building it will emerge from? What about when I have multiple bases spread across the map?