Though he entered combat late in May 1942, Carl Emmermann sank twenty-six Allied ships in only four combat patrols while commanding U-172, becoming the thirteenth most successful U-boat commander of the war. U-172, a Type IXC U-boat, saw non-stop action throughout the Atlantic, during its four patrols under Emmermann. U-172's third patrol to Cape Town would be its longest with 131 days at sea, where it added eight vessels to its list of successes...