Competition over the fur trade and over captives to replace population lost to epidemics drove a long series of wars in which the Haudenosaunee confederacy attacked and dispersed its neighbours. The Wendat confederacy, already halved by smallpox in the 1630s, was broken in 1649-1650 when its principal towns were destroyed; the Petun, Neutral, Erie and later the Susquehannock followed. Survivors were killed, fled westward and northward, or were adopted into Haudenosaunee communities in numbers large enough that Jesuit observers reported adoptees outnumbering the original population of some towns. The wars emptied southern Ontario and the Ohio country of settled villages for a generation and reshaped the map of the eastern Great Lakes before the Great Peace of Montreal in 1701. The atlas covered New England's Pequot and King Philip's wars but nothing of the interior; this is the largest Indigenous-driven displacement in seventeenth-century North America.
The Haudenosaunee (Iroquois) confederacy, armed by Dutch and English traders, destroyed or absorbed neighbouring nations and emptied large areas of the eastern Great Lakes; French and Algonquian allies fought back
Reconstructed from Jesuit Relations village and longhouse counts and archaeological settlement survey rather than any census. Trigger put the Wendat at about 20,000-30,000 before the epidemics of 1634-40, with the Neutral of comparable size and the Erie and Petun smaller; totals for the five nations are usually placed between 60,000 and 110,000.
No count exists. The range is a scholarly order-of-magnitude estimate across nearly a century, and folds together killing in raids, deaths in flight and famine, and the smallpox and measles epidemics of the 1630s-1660s that preceded and enabled the dispersals; separating war deaths from epidemic deaths is not possible with the Jesuit sources available.
The Jesuit Relations, written by missionaries resident among the Wendat and later among the Haudenosaunee, record the destruction of the Wendat towns and the adoption of captives including children.
United States of America, Canada