Around the year 1670, Seneca warriors from the New York Iroquois Confederacy conquered the territory of the Manahoac of Northern Piedmont. That year the Virginia Colony had expelled the Doeg from Northern Virginia east of the fall line. With the Seneca action, the Virginia Colony became "de facto" neighbours of part of the Iroquois Five Nations. Although the Iroquois never settled the Piedmont area, they entered it for hunting and raiding against other tribes. The first treaties conducted at Albany between the two powers in 1674 and 1684 formally recognized the Iroquois claim to Virginia above the Fall Line, which they had conquered from the Siouan peoples. At the same time, from 1671 to 1685, the Cherokee seized what are now the westernmost regions of Virginia from the Xualae.