The Canada–United States border is the longest international border in the world. The boundary (including … See more

The Treaty of Paris of 1783 ended the American Revolutionary War between Great Britain and the United States. In the second article of the Treaty, the parties agreed on all boundaries of the United States, including, b… See more

The International Boundary is commonly said to be the world's "longest undefended border", though this is true only in the military sense, as civilian law enforcement is present. It is illegal to cross the border outside bor… See more

The length of the terrestrial boundary is 8,891 km (5,525 mi), of which 6,416 km (3,987 mi) is against the contiguous 48 states, and 2,475 km (1,538 mi) against Alaska. Eight out of thirteen provinces and territories o… See more

United States Customs and Border Protection maintains pre-clearance facilities at nine Canadian airports with nonstop air service to the United States: Calgary; Edmonton; Halifax Stanfield;
Both New … See more

To be a true international exclave, all potential paths of travel from the exclave to the home country must cross over only the territory of a different country or countries. Like exclaves, practical exclaves are not contiguous … See more