Tobacco. Good luck with whatever this is for! ^-^
The War of 1812.
A war between the US and G. Britain caused by American outrage over the impressment of American sailors by the British, the seizing of American ships, and British aid to the Native Indians attacking the Americans on the western frontier. All this enhances the feeling of nationalism among the Americans and caused the war of 1812.
They relied on Forts Jackson and St. Philip, and helped with defense of them.
In their views was to protect and preserve slavery. This is the reason why they helped the union in Civil War.
Trade outside the country was not necessary