The most populous Iroquoian nation of the lower lakes, the Neutrals held the Niagara Peninsula and Grand River and kept an uneasy peace between Huron and Iroquois — hence their French name.
Disease and famine cut them from ~40,000 to ~12,000, then the Iroquois overran their towns in 1651; the last independent reference dates to 1653, after which survivors were absorbed by the Seneca.
The atlas holds 3 border frames for Neutral Confederacy (Attawandaron) — the shape you scrub through changes in 1400 · 1626 · 1651.
Treats the Neutral Confederacy and its 1651 overrun by the Iroquois (regional context).
Contemporary accounts of the Iroquoian peoples of the Niagara Peninsula (primary-source context).