Pompeii was probably founded by the Oscans around the 8th century BC. This ancient Italic people settled on the southern slopes of Mount Vesuvius along the banks of the Sarno River, which was navigable at the time. Pompeii became an important commercial center early on, catching the interest of the invading Greeks and Etruscans. The Etruscans were conquered on the waters off Cuma, and the city came under domination by the Samnites in the 5th century BC http://pompeiisites.org/en/