The Treaty of Paris of 1763 changed the borders of what now is the United States. In 1763, we still were colonies of Great Britain. Thus, this treaty changed the boundaries of land Great Britain controlled in North America.
As a result of this treaty, Great Britain got control of all of France’s land in what is now the United States that was east of the Mississippi River, except for New Orleans. Great Britain also got control over Florida. Spain, which helped France, gave us Florida since they were on the losing side. Great Britain also got some of France’s land in Canada. Getting this land secured British ownership of its colonies. The Spanish received all of France’s land west of the Mississippi River plus New Orleans. Thus, the treaty of Paris of 1763 totally altered control of North America including land that currently makes up the United States.