Final answer:
The Rush-Bagot Agreement of 1817 was a diplomatic success that demilitarized the Great Lakes region by limiting the number of warships and fostered peaceful relations between the U.S. and Great Britain.
Step-by-step explanation:
The Rush-Bagot Agreement of 1817 was a diplomatic achievement of John Quincy Adams which significantly reduced military presence on the Great Lakes and laid the groundwork for more amicable relations between the United States and Great Britain.
It effectively demilitarized the Great Lakes region by limiting the number of warships that both countries could deploy there, thus preventing potential future conflicts. This agreement helped to bring long-term peace and was part of broader efforts to improve foreign trade and economic health between the two nations after the War of 1812.