Warehouse 77 is a privately owned warehouse on the Citadel. Bought by a mysterious and very wealthy person over the extranet, not many people know exactly what is inside of the warehouse.
It was purchased by none other than Warlord through the use of an agent. The Warehouse has hundreds of weapons for Warlord's use. Along with the conventional rifles, heavy weapons, and close-quarters systems in Warlord's arsenal, the Warehouse holds nearly two thousands mechs and attack drones. Warlord made use of Warehouse 77 as a back-up plan. If he were ever severely beaten enough, he would use this arsenal to take control of the Citadel and hopefully use the entire station as a hostage.