A lot of the founding fathers were invested in land speculation companies (kinda similar to Blackrock but with less restrictions). And one of their big complaints to the crown was that they weren’t allowed to go on extermination campaigns (like the Beaver Wars) whenever they pleased in order to pressure tribes into selling. The british govt drew a hard line at the Appalachians.

Then after the Revolution, one of George Washington’s first acts in office was to start the Northwest Indian War. History books emphasize the taxation aspect because it’s more sympathetic, but don’t really draw the arrow on the chart connecting the precedents for the Revolutionary War with events like the Trail of Tears and Tecumseh’s war. In the schoolbooks those things just sorta happened…for reasons.