Austro-Hungarian Navy marine and submarine officer
Rudolf Singule was a Czech-Austrian officer in the Austro-Hungarian Navy. He was one of the most successful Austro-Hungarian submarine commanders of World War I, sinking 11 Allied merchant ships and two Allied warships displacing 22,276 GRT. After the war he joined the Czechoslovak Army as a reservist and eventually served in Nazi Germany's Kriegsmarine submarine units during World War II.
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