The Senedo people lived in the Shenandoah Valley around Woodstock, but they disappeared as a tribe prior to European settlement, possibly from attack by the Catawba to the south. By the time the German settlers arrived, few Native Americans lived in the Shenandoah Valley. Several later tribes hunted in the valley, among them the Shawnee, Occoneechee, Monocans and Piscataways and the powerful Iroquois Confederation, so while not inhabiting the area Indians were likely not an uncommon sight. The seven bends have locations associated with Indian mounds dating back to the Late Woodland Period (AD 900–1650) in the area of the river between Woodstock and Strasburg, Virginia. After 250 years of plowing by settlers, the mounds have largely disappeared from sight, though traces of them have been detected with aerial photography