Italy has been known by that name since around the 1st century BC when it referred to the entire peninsula south of the Alps. Earlier, when the name first appeared, it was used only for the southern tip. Between the 1st century BC and 5th century AD, Italy was under the single control of Rome. For all other periods, the desirable territory was fought over by many rival groups until it again became a unified nation in 1861. By the 4th century BC, the Etruscans were losing power to the expanding Romans, who had once been part of the Etruscan world and even ruled by Etruscan kings. Through military power and offering citizenship, Rome gradually extended its rule