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Dueling Doppelgängers

http://commons.wikimedia.org/wiki/File:Sinking_Cap_Trafalgar.jpg

When World War I broke out in August 1914, Germany enlisted a large ocean liner, the Cap Trafalgar, to attack British merchant ships around Cape Horn. While at a supply base on Trinidade, it was surprised by the HMS Carmania, a British liner that had been similarly pressed into service by the British navy.

The two enormous ships squared off and fought a murderous sea battle. In the end the Cap Trafalgar sank, and the Carmania limped away to a Brazilian port.

An observer might still have wondered which side won — by an ironic coincidence, the Cap Trafalgar had been disguised as the Carmania and the Carmania as the Cap Trafalgar.