When it sank it was in the middle of the north Atlantic, far from the US. She was on her maiden voyage, her first trans-oceanic crossing. She was never within the borders of the US.
There are many lakes within the borders of the US. If you mean one of the Great Lakes, it is Lake Michigan.
There has been no conflict on the borders.
Lake Michigan
Lake Michigan is all USA borders. The others have part of Canadian borders.
Lake Michigan.
The Citizens, the People, and technically all people within her borders.
The US is located in the Western Hemisphere and the Northern Hemisphere.
South Dakota is a US State and has no states within its borders.
Hawaii is a US State and has no countries within its borders.
None within the continental U.S.
Illinois shares land borders with several other US states and one of the Great Lakes, but does not share a border with another country. It is possible, though, to travel by boat from Illinois to Canada.
Only Lake Michigan is entirely within US borders.