49th Parallel1941

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Prologue:
I see a long, straight line athwart a continent. No chain of forts, or deep flowing river, or mountain range, but a line drawn by men upon a map, nearly a century ago, accepted with a handshake, and kept ever since. A boundary which divides two nations, yet marks their friendly meeting ground. The 49th parallel: the only undefended frontier in the world.