Our American ancestors, right from 1776, warred about as much as we war now. I hope to give you some brief histories of a few of those wars in the future. When you have questions I can add important points or data to one of those histories.
Right now I will say a first bit about the "Chickamauga War."
Historians talk about the Chickamauga war, but I like to say "wars" because the Chickamauga wars started early and lasted long enough to change locations of and reasons for the killing. They paused killing to change locations and renew their reasons for killing.
Some call them the Cherokee wars. When Cherokee ancestors protected their families, tribe, and territory from the violence of our invading ancestors, our ancestors killed them; killed them man, woman, and child; killed them and took their homes and their land. Ancestors, theirs and ours killed each other. Our ancestors most often proved to be the better killers.
Even so, the Cherokee people, with the sometime help of other peoples such as the Muskogee and Shawnee, actively resisted for nearly a century. According to some histories, those wars continued for "only" 20 years.
Much of those struggles took place in what we might call the northern tier of the southern states; states like Tennessee, Kentucky, West Virginia, Arkansas, and North Carolina.
Mostly the Cherokee depended on their native allies, but they also allied themselves with the Kingdom of Great Britain to protect themselves from invasion and occupation by "Americans."
The Cherokee, it may well be remembered, are one of those people we called "civilized tribes." They were called civilized for a variety of reason; reasons such as their lifestyle; their way of dealing with others, and their knowledge of agriculture. They also married widely with Europeans from, perhaps, well before the first colonies were established in North America. The Cherokee, I believe, have long established bloodlines with Portuguese, Irish, Welsh, Scot and others.
During much of the most severe strife between Cherokee and American, an important Cherokee leader was Dragging Canoe.
Do you want to know why, besides, ignorance, these conflicts were called Chickamauga Wars rather than Cherokee Wars? Ask me or check with Wikipedia or Google.
The Cherokee are distant relatives of the Iroquois and spoke an Iroquoian language. They probably migrated south from Iroquois territory around the Great Lakes in pre-Columbian times. So, they may well have dispossessed others to claim the territory of those others.