Thank you for your response! Yes, it is true that the States were limited to the east coast initially, though it took so little time to expand westward that I opted to omit it for conciseness of the text. However, as this did play a vital role in their expansionary mentality, and the brutality that the states would show to their fellow human beings, I realize now I should not have excluded it. Especially given how they were constantly rewarded for their effort to eradicate the natives with land, slaves, and resources.
Fantastic video! Do keep in mind however, that Thunderf00t is a very socially and economically conservative person of which you should watch with caution. I mostly keep to watching his Elon dunk videos and his pseudo-scientific-Kickstarter de-legitimizing videos.