I really hope you realize what a ridiculous statement you have made in a public forum.
When the first Americans supposedly crossed a land bridge 12,000 years ago; they probably did not lay claim the entire continent either. However I am sure they were fiercely protective over fishing and hunting areas that kept there tribe/group/family fed and clothed. I really doubt if you showed up at a productive fishing hole that was claimed by another group you would be welcomed.
But hey you are the expert.