The United States declared war on Britain in 1812. It did so because Britain refused to stop seizing American ships that traded with France—Britain's enemy in Europe. Sometimes there were also seizures of American sailors. These seizures were known as impressment
They both had 1 ruler and they both made calendars
"popular sovereignty" which really just allowed settlers of the territory to decide whether slavery would be banned within their new state's border. Causing many people to rebel including the KKK.<span />
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