On this day, June 4th, in 1944 United States Navy Task Group 22.3 captured U-505 [1], a German submarine and with it an intact Enigma cypher machine. This was the first time since the USS Peacock seized HMS Nautilus in 1815 that the USN had captured an enemy vessel at sea. The sub, reunited with its periscope a decade ago [2], is displayed at the Museum of Science and Industry [3] in Chicago.