USA was a faction with more than 10 members, headed by blakestickals8 and creeperboss13. When the FACTO alliance declared war on Arabia, Arabia had already learned the location of the base, and raided it. The faction soon disbanded, with its members joining factions such as Rebels, and some creating their own factions, such as creeperboss13, who created Greece. (Now allied to Arabia).
Fun fact: IronHoarder single handedly forced the USA and Rebels faction members to destroy their own base in order to protect the items from the hands of IronHoarder.