Final answer:
The Treaty of Paris signed in 1783 ended the Revolutionary War, affirming American independence and facilitating westward expansion.
Step-by-step explanation:
The treaty that ended the Revolutionary War acknowledged American independence, and opened the path for westward expansion was the Treaty of Paris signed in 1783. Influential American statesmen like Benjamin Franklin, John Adams, and John Jay negotiated the treaty with British representatives.
The Treaty of Paris recognized the United States' sovereignty and established its borders, stretching from the Mississippi River to the Atlantic Ocean, with Canada to the north and Florida to the south. Additionally, the treaty settled matters by granting New Englanders fishing rights off Newfoundland and setting a precedent for the treatment of Loyalist property and the approach to Native American territories.