Final answer:
The Treaty of Paris of 1783 recognized U.S. independence, established the Mississippi River as the westernmost border, and set other geographical boundaries. It also addressed the treatment of Loyalists and gave fishing rights, but its enforcement was imperfect, leading to future conflicts.
Step-by-step explanation:
The Treaty of Paris of 1783 was the agreement that ended the American Revolutionary War and recognized the independence of the United States. The treaty stipulated several terms significant for the establishment of the new nation's geographical and political boundaries. Notably, it established the Mississippi River as the westernmost border of the United States, in addition to setting the boundaries to Canada in the north, the Atlantic Ocean to the east, and Spanish Florida to the south. The treaty also granted fishing rights off Newfoundland to New England fishermen and addressed the issue of restitution and non-persecution of Loyalists.
Despite its crucial role in formalizing peace, the Treaty of Paris was imperfectly enforced, with issues such as the slow British military withdrawal from American territories, unresolved Native American claims to land, and continued British interference with American shipping that eventually contributed to the War of 1812.