America

Our land-what is now Japan was once inhabited by Ainu ( thought to be a sub branch of early Caucasians that spread out throughout the Eurasian continent before Mongolods occupied the area ) partly in North and Polynesians ( thought to be people who came over by catamalan along with southern islands ) in South. When invaders came from the Asian continent roughly 2000 years ago, they started being excluded from the land. They were entirely eliminated from the main part of land by circa 800 AD.
Britain, once inhabited largely by Celtic people, were invaded from Angles &Saxons in 5c, and again by Normans in 11c, so Britain now is differnt from what it was before 11c, and 5c.
America, once inhabited by proto-Mongoloids who were thought to come from the north when still Siberia & Alaska was connected with the land more than 12,000 years ago. It was rather very recently, they came not to be the only people who live in America when Europeans started coming in America in 15c.
And more importantly, I'm afraid you don't have to particularly keen on distinguishing indigenous Americans and European settlers. Since conflicts were everywhere, they themselves also were repeating a history of invasion and defence inside America.