For now and future reference....A brief treatise on reasonable (or more often, historical) starting positions...
English: Chesapeake Bay, Carolinas, Bahamas
French: Mouth of St. Laurence, St. Laurence, Newfoundland, St. Thomas
Netherlands: New York, Suriname (Guiana)
Spanish: Puerto Rico, Hispaniola, Panama, Florida (St. Augustine or Tampa), Cuba, North of Columbia
Portugal: Brazil (many places)
Sweden: Delaware
Denmark: Virgin Islands
Aztec: Central Mexico
Purepecha: Southwestern Mexico
Maya: Yucatan, "southern" Central America
Chimu: Northern Peru
Inca: Southern Peru
Mapuche: Argentina, Chile
Tupi-Guarani: Central Brazil, Could be representative of many tribes in SA
Carib: Lesser Antilles, Guiana region, Greater Antilles (as invaders)
Arawak: Greater Antilles
Calusa: Southern Florida
Powhatan: Chesapeake, West Virginia
Lenni Lenape: Delaware, New York
Iroquois: Great Lakes (ideally in northern New York)
Huron: St. Laurence River
Shawnee: Between Missouri River and Appalachians
Creek: Arkansas, North to Ohio, East to Mississippi
Cherokee: Northern Georgia (ideally), almost anywhere in Southeast NA. Later forced en masse to the west, largely into Oklahoma (this also applies to the Shawnee and Creek, and possibly the Calusa.)
Navajo: Arizona
Apache: New Mexico, Arizona, Western Texas, Oklahoma
Lakota (Sioux): Dakotas
Cheyenne (also representing the Arapaho): Nebraska, Colorado, Dakotas, Wyoming
Blackfoot: Montana, Alberta (could be safely placed almost anywhere on plains in Western Canada)
Nez Perce: Washington, Oregon, Idaho, could also be used to represent some tribes in northern california
Haida: Queen Charlotte Islands (ideally), Alaska, coastal Western Canada