They began to claim ownership of the territory by right of conquest .
Around 1670 , the Iroquois drove the Siouan - speaking Mannahoac tribe out of the northern Virginia Piedmont region .
Iroquois began to claim ownership of the territory by right of conquest .
Around 1670 , the Iroquois drove the Siouan - speaking Mannahoac tribe out of the northern Virginia Piedmont region .