I have a longer comment below and to the guy that replied to you. I actually did a lot of comments in this post. It's gotten some good reply activity.
The INDIANS (aka Native Americans) were known to invade each other, and even have slavery themselves. Different tribes were like different nations. In fact they referred to each other as nations.
The fact is every spec of land has changed hands over time.
The only thing you should be responsible for is YOUR actions. Not those of your ancestors. If your ancestors owned slaves that does not make you a slave owner. You were not alive.
If your ancestor was a serial killer. That doesn't make you a serial killer.
You owe the descendants of actions taken by others and NOT you nothing. Likewise, they owe you nothing.
The only thing you are responsible for is your choices and their consequences.