The border between the United States and Canada is the longest international border on Earth — stretching over 8,800 kilometers (5,500 miles).
But why is it so long, and how did two massive countries manage to share it peacefully?
This video explores the history behind the 49th parallel, the treaties that shaped North America, and how this invisible line became a symbol of friendship and diplomacy rather than war.
A story of maps, power, and one very polite boundary.

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