1783 was the date of the Treaty of Paris which officially separated the 13 American colonies from Great Britain. At that time the eastern border of what would be called the United States was delineated by the former colonies that had a coastline with the Atlantic Ocean. At that time all of the 13 colonies had a water access route to the Atlantic Ocean.
The Atlantic Ocean.
1783
it aquuired on 1783
1783.
Treaty of Paris of 1783, brought about the end of the war of independence between America and Britain - recognising the independence of America.
The eastern border of the US was and is the Atlantic Ocean.
The Atlantic Ocean defines the United States' eastern border.
The US state of Montana has an eastern border with North Dakota and South Dakota.
There are no countries that border the US on the east. The eastern US is bordered by the Atlantic Ocean. and their northern Border has Canada all the way to the Canadian north pole.
200 miles
I not 100% but I think it is Spain.
Russia does not share an eastern border with anyone, but it is on the coast of the Bering Sea and just across that is the US state of Alaska.
North Dakota and South Dakota border Minnesota to the east.
Canada touches the entire northern border of the 48 contiguous United States, and the whole eastern border of Alaska.
Louisiana
Independent
The Atlantic Ocean.