During his 1609 exploration of the Potomac River, Captain John Smith encountered the Doeg, also rendered in English as the Dogue, Taux, and Tauxenent, one of many Native American groups in the region. They occupied the area from the Northern Neck, present day King George County, to Fairfax County. In Prince William they lived along and named Chopawamsic, Quantico, Yosocomico (Powell's), Neabsco, and Marumsco Creeks. What Smith believed to be their largest village and capital, Tauxenent, was located on the Occoquan River in the vicinity of what is now known as Mason's Neck. The Doeg were decimated by European diseases and were forced from their homes, often violently, by European settlers and neighboring tribes. By 1670 most of the Doeg were gone from Prince William County, and those not killed took refuge across the Potomac in Maryland or assimilated into settler or other tribal societies.