Iroquoian peoples in the context of Attawandaron

The Niagara River (/naɪˈæɡərə, -ɡrə/ ny-AGG-ər-ə, -⁠grə) flows north from Lake Erie to Lake Ontario, forming part of the border between Ontario, Canada, to the west, and New York, United States, to the east. The origin of the river's name is debated. Iroquoian scholar Bruce Trigger suggests it is derived from a branch of the local Neutral Confederacy, referred to as the Niagagarega people on several late-17th-century French maps. George R. Stewart posits that it comes from an Iroquois town named Ongniaahra, meaning "point of land cut in two."

The river, occasionally described as a strait, is approximately 58 kilometres (36 mi) long and includes the Niagara Falls. Over the past 12,000 years, the falls have moved roughly 11 kilometres (6.8 mi) upstream from the leading edge of the Niagara Escarpment, creating a gorge below the falls. Today, the diversion of the river for electricity generation has significantly slowed the rate of erosion. The total elevation drop along the river is 99 metres (325 ft). The Niagara Gorge, downstream from the falls, includes the Niagara Whirlpool and additional rapids.

The Neutral Confederacy (also Neutral Nation, Neutral people, or Attawandaron) was a tribal confederation of Iroquoian peoples. Its heartland was in the floodplain of the Grand River in what is now Ontario, Canada. At its height, its wider territory extended toward the shores of lakes Erie, Huron, and Ontario, as well as the Niagara River in the east. To the northeast were the neighbouring territories of Huronia and the Petun Country, which were inhabited by other Iroquoian confederacies from which the term Neutrals Attawandaron was derived. The five-nation Iroquois Confederacy was across Lake Ontario to the southeast.

Like others of Iroquoian language and culture, the tribes would raid and feud with fellow Iroquoian tribes. They were generally wary of rival Algonquian-speaking peoples, such as those who inhabited Canada to the East, along the St. Lawrence Valley basin. Iroquoian tribes were later known to historians for the fierce ways in which they waged war. A largely agrarian society, the Neutral Confederacy developed farmsteads that were admired and marveled over by European leaders writing reports to their sponsors.

The Petun (from French: pétun), also known as the Tobacco people or Tionontati (Dionnontate, Etionontate, Etionnontateronnon, Tuinontatek, Dionondadie, or Khionotaterrhonon) ("People among the hills/mountains"), were an indigenous Iroquoian people of the woodlands of eastern North America. Their last known traditional homeland was south of Lake Huron's Georgian Bay, in what is today's Canadian province of Ontario.

The Petun were closely related to the Wendat, or Huron. Similarly to other Iroquoian peoples, they were structured as a confederacy. One of the less numerous Iroquoian peoples when they became known to Europeans, they had eight or nine villages in the early 17th century, and are estimated to have numbered around 8,000 before European contact.