In the Rush-Bagot Agreement, the United States and Britain agreed to substantially demilitarize the Great Lakes boundary between the US and British Canada, with each cutting their fleets to far fewer vessels. This was the first disarmament agreement made by the United States.
In the Adams-Onís Treaty was negotiated by John Adams and the Spanish Minister to the United States. Spain ceded Florida to the United States. The treaty also established the border between Spanish territory and the US.