X Flottiglia MAS
The X Flottiglia MAS or Decima Flottiglia MAS was a italian special military unit of the Regio Marina (Navy of the Kingdom of Italy) until 1943, and then of the Marina Nazionale Repubblicana of the Italian Social Republic until the end of World War II under the command of Junio Valerio Borghese.
Decima MAS was active during the Battle of the Mediterranean and took part in a number of daring raids on Allied shipping. These operations involved surface speedboats (such as the Sinking of HMS York), manned torpedoes (the Raid on Alexandria) and Gamma Frogmen (against Gibraltar). During the campaign Decima MAS took part in more than a dozen operations which sank or damaged five warships and 20 merchant ships totalling 130,000 GRT (Gross Register Tonnage).