Десятая флотилия MAS: Итальянские подводные диверсанты эпохи фашизма

Italian naval commando frogman unit of the Fascist era

The Decima Flottiglia MAS (Decima Flottiglia Motoscafi Armati Siluranti, also known as La Decima or Xª MAS) (Italian for "10th Assault Vehicle Flotilla") was an Italian flotilla, with marines and commando frogman unit, of the Regia Marina (Royal Italian Navy) created during the Fascist regime. The acronym MAS also refers to various light torpedo boats used by the Regia Marina during World War I and World War II. 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 raid on Souda Bay), human 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 (totalling 72,000 tons) and 20 merchant ships (totalling 130,000 GRT). In 1943, after the Italian dictator Benito Mussolini was ousted, Italy left the Tripartite Pact. Some of the Xª MAS men who were stationed in German occupied northern and central Italy enlisted to fight for Mussolini's newly formed Italian Social Republic (Repubblica Sociale Italiana or RSI) and retained the unit title, but were primarily employed as an anti partisan force operating on land. Other Xª MAS men in southern Italy or other Allied occupied areas joined the Italian Co Belligerent Navy as part of the Mariassalto (Naval Assault) unit.

In World War I, on November 1, 1918, Raffaele Paolucci and Raffaele Rossetti of the Regia Marina rode a human torpedo (nicknamed Mignatta or "leech") into the harbour of Pula, where they sank the battleship Jugoslavija, of the navy of the State of Slovenes, Croats and Serbs, formerly the Austro Hungarian battleship , and the freighter Wien using limpet mines. They had no underwater breathing sets, and thus had to keep their heads above water to breathe. They were discovered and taken prisoner as they attempted to leave the harbour. In the 1920s, sport spearfishing without breathing apparatus became popular on the Mediterranean coast of France and Italy. This spurred the development of modern swimfins, diving masks and snorkels. In the 1930s Italian sport spearfishermen began using industrial or submarine escape oxygen rebreathers, starting scuba diving in Italy.

This new type of diving came to the attention of the Regia Marina which founded the first special forces underwater frogman unit, later copied by the Royal Navy and United States Navy. Capitano di Fregata (Commander) Paolo Aloisi was the first commander of the 1ª Flottiglia Mezzi d'Assalto ("First Assault Vehicle Flotilla"), formed in 1939 as a result of the research and development efforts of Majors Teseo Tesei and Elios Toschi of the naval combat engineers. The two resurrected Paolucci's and Rossetti's concept of human torpedoes. In 1941, Commander Vittorio Moccagatta re organised the First Flotilla into the Decima Flottiglia MAS, and divided the unit into two parts – a surface group operating fast explosive motor boats, and a sub surface weapons group using human torpedoes called SLC (siluri a lenta corsa or "slow running torpedoes", but nicknamed Maiale or "Pig" by their crews), as well as "Gamma" assault swimmers (nuotatori) using limpet mines. Moccagatta also created the frogman training school at the San Leopoldo base of the Italian Naval Academy in Livorno.

The Decima MAS saw action starting on June 10, 1940, when Fascist Italy entered World War II. In more than three years of war, the unit destroyed some 72,190 tons of Allied warships and 130,572 tons of Allied merchant ships. Personnel from the unit sank the World War I era Royal Navy battleships and (both of which, after months of work, were refloated and returned to action), wrecked the heavy cruiser and the destroyer , damaged the destroyer and sank or damaged 20 merchant ships, including supply ships and tankers. During the course of the war, the Decima MAS was awarded the Golden Medal of Military Valour and individual members were awarded a total of 29 Golden Medals of Military Valour, 104 Silver Medals of Military Valour and 33 Bronze Medals of Military Valour.

June 10, 1940: Benito Mussolini declared war on United Kingdom. August 22, 1940: While preparing for an attack on the British naval base at Alexandria, Egypt, the Italian submarine Italian submarine Iride (carrying four Maiale and five two man crews) and the support ship Monte Gargano were attacked and sunk in the Gulf of Bomba off Tobruk, Libya, by British land based Fairey Swordfish torpedo bombers. Teseo Tesei survived the attack, but casualties among the submarine crew were heavy. September 21, 1940: The Italian submarine Gondar departed La Spezia for Alexandria, carrying three Maiale and four two man crews. The Gondar reached Alexandria on the evening of September 30, but was spotted by British and Australian destroyers, which attacked. Severely damaged, it was forced to the surface and scuttled by the crew. They were captured, along with the Decima MAS crewmen (including Elios Toschi). September 24, 1940: The Italian submarine Italian submarine Sciré, commanded by Commander Junio Valerio Borghese, departed La Spezia carrying three human torpedoes and four crews, for a planned attack on the British naval base at Gibraltar. The operation was cancelled when the British fleet left harbour before the submarine arrived. October 21, 1940: Sciré departed La Spezia and sailed again to Gibraltar carrying three human torpedoes and four crews. The Decima MAS frogmen entered the harbour, but were unable to attack any ships due to technical problems with the torpedoes and breathing equipment. Only one human torpedo managed to get close to a target, the battleship Barham. The charge exploded but did not cause significant damage. The two crewmen, Gino Birindelli and Damos Paccagnini, were captured by the British. The other four (including Teseo Tesei) manage to reach Spain and returned to Italy. Valuable experience was gained in this operation by the Decima. Gino Birindelli received the Medaglia d'Oro al Valor Militare (MOVM), his second, Damos Paccagnini received the Medaglia d'Argento al Valore Militare (MAVM).

March 25, 1941: The Italian destroyers Italian destroyer Francesco Crispi and Italian destroyer Quintino Sella departed Leros island in the Aegean at night, each carrying 3 small (2 ton) Motoscafo da Turismo motor assault boats of the Decima MAS. Each MT (nicknamed barchini or "little boats") carried a 300 kg (660 lb) explosive charge in its bow. The one pilot craft were launched by the destroyers 10 miles off Suda Bay, Crete, where several British Royal Navy warships and auxiliary ships were at anchor. The MTs were specially equipped to make their way through obstacles such as torpedo nets; the pilot steered the assault craft in a collision course at his target ship, and jumped from his boat before impact and warhead detonation. Once inside the bay, the six boats located their targets: the heavy cruiser , a large tanker (the Norwegian Pericles of 8,300 tons), another tanker, and a cargo ship. Two MTMs hit York amidships, flooding her aft boilers and magazines. Pericles was severely damaged and settled on the bottom, while the other tanker and the cargo ship were sunk. The other barchini apparently missed their intended targets, and one of them was stranded on the beach. All six of the Italian sailors were captured. The disabled York was later scuttled in shallow waters with demolition charges by her crew before the German capture of Crete, while Pericles sank in April 1941 en route to Alexandria. May 25, 1941: The Sciré departed La Spezia carrying three human torpedoes. At Cadiz, Spain it secretly embarked eight Decima MAS crewmen. At Gibraltar, they found no warships because , , and had been ordered to the Atlantic to hunt the German battleship German battleship Bismarck. The torpedoes once again experienced technical problems as they unsuccessfully attempted to attack a freighter. The crew returned to Italy via Spain. June 26, 1941: An attack on Malta similar to the July 26, 1941 operation (see below) was planned but was canceled due to bad weather. July 26, 1941: Two Maiale and ten MAS boats (including six barchini) unsuccessfully attacked the port of Valletta, Malta. The force was detected early on by a British radar installation, but the British coastal batteries held their fire until the Italians approached to close range. Fifteen Decima MAS crewmen were killed (including Commander Moccagatta), and 18 were captured. Teseo Tesei and Petty Officer it on one torpedo died by Fort St. Elmo as they attempted to destroy the outer defenses of the harbour. Lieutenant Franco Costa and sergeant Luigi Barla on the other torpedo became lost, scuttled their craft, and swam ashore at St. George's Bay two miles NW of Valletta. Their Maiale was recovered by the British, becoming the first example they had been able to examine.) boats were lost, one of them being found adrift in open seas by the British and towed to port by a seaplane. This disaster forced the unit to make a huge reassessment of its operations. Commander Ernesto Forza was named as commander of the Decima MAS, and Borghese became leader of the sub surface weapons group. September 10, 1941: The Sciré departed La Spezia carrying three human torpedoes. At Cadiz, Spain, it secretly embarked eight crewmen for them. At Gibraltar, the torpedoes sank three ships: the tankers Denbydale and Fiona Shell, and the cargo ship Durham. All six crewmen swam to Spain and returned safely to Italy, where they were decorated, as were the crew of Sciré. December 3, 1941: Sciré departed La Spezia carrying three human torpedoes to conduct what became the Raid on Alexandria (1941). At the island of Leros in the Aegean Sea, six Decima MAS crewmen came aboard, including Lieutenant Luigi Durand de la Penne. On December 18 Sciré released the torpedoes 1.3 miles from Alexandria commercial harbour, and they entered the harbour when the British opened the boom defence to let three of their destroyers pass. After many difficulties, de la Penne and his crewmate Emilio Bianchi successfully attached a limpet mine under , but had to surface as they attempted to leave, and were captured. They refused to answer when questioned and were detained in a compartment aboard Valiant. Fifteen minutes before the explosion, de la Penne asked to speak to the Valiants captain and informed him of the imminent explosion but refused to give other information. He was returned to the compartment and neither he nor Bianchi were injured by the detonation of the mine. The other four torpedo riders were also captured, but their mines sank Valiant, the battleship , and the Norwegian tanker Sagona, and badly damaged the destroyer The two battleships sank in only a few feet of water and were subsequently re floated and repaired, being out of action for over a year.

April 29, 1942: The Italian submarine Ambra departed La Spezia carrying three human torpedoes. At Leros six crewmen were secretly loaded for them. On May 14 Ambra reached Alexandria and sank a British floating dock. The Ambra was spotted and could not sink anything. All six torpedo riders were captured. July 1942: Italian frogmen set up a secret base in the Italian tanker Olterra which was interned in Algeciras near Gibraltar. All materials had to be moved secretly through Spain and this limited operations. July 13, 1942: Twelve Italian frogmen swam from the Algeciras coast into Gibraltar harbour and set explosives, and then returned safely. Four ships were sunk. August 10, 1942: The Italian submarine Scirè was sunk by HMS Islay while attempting to attack the port of Haifa in British Palestine. She had 11 frogmen on board. August 29, 1942: Off El Daba, Egypt. The was torpedoed at close range by an MTSM, a torpedo carrying version of the MTM. Six of her crew were lost. was towed to Alexandria, but soon after was declared a "constructive total loss", and was scrapped in 1946. December 4, 1942: The Ambra left La Spezia to attack Algiers, carrying frogmen and two human torpedoes. Ten frogmen carrying limpet mines swam with the human torpedoes, but because of the distance, they did not reach the harbour, but attacked ships outside it, sank two and damaged two others. December 17, 1942: Six Italians on three torpedoes left the Olterra to attack the three British warships , , and in Gibraltar. A British patrol boat killed one torpedo's crew (Lt. Visintini and Petty Officer Magro) with a depth charge. Their bodies were recovered, and their swimfins were taken and used by two of Gibraltar's British guard divers. Another British patrol boat spotted another torpedo, and chased and shot at it and captured its two crewmen. The remaining torpedo returned to the Olterra without its rear rider.

Some Xª MAS men who were in German occupied Italy remained part of the Axis forces, joining the Italian Social Republic under the command of Captain Borghese. His reputation and that of the Xª MAS enabled him to negotiate an agreement with the German forces that gave the Xª MAS significant autonomy, allowed them to fight under an Italian flag (under the command of the Germans), and not to be employed against other Italians. Borghese was recognized as the leader of the corps.

The main themes in the Xª MAS's ideology became "honour" in defending Italy from the "betrayal" of the armistice with the Allies and a call to defend the territorial integrity of Italy against the Allies. The corps had its own weekly magazine, L'orizzonte ("The Horizon"), in which authors such as Giovanni Preziosi wrote vehemently anti Semitic articles about Jewish conspiracies. The magazine had problems in its distribution, as it was thought that Borghese's popularity among the Fascist hardliners might reduce Mussolini's influence.

Relationships with the Italian Social Republic were not easy. On January 14, 1944 Benito Mussolini arrested Borghese while receiving him in Gargnano, in order to gain direct control of the Xª MAS. Word of the arrest reached the officers of the Decima, who considered marching on Mussolini's capital at Salò. However, the German command used their influence to have Borghese released, as they needed the equipment, expertise and manpower of the Xª MAS as an anti partisan force.

The Xª MAS (RSI) took little part in the war at sea. Its equipment had been abandoned in the south, and its naval activities were frustrated by Allied action.

The Decima was mostly employed in anti partisan actions on land, rather than against the Allies at sea. However, their actions were mostly reprisals following the massacre of soldiers of "Decima" by partisans forces – see Bardelli's homicide. Their anti partisan actions usually took place in small villages, where the partisans were stronger. Some examples:
Forno: 68 persons, mostly civilians and some partisans, were killed by a combination of SS members and Xª MAS forces. Guadine: Random violence to terrorize a population believed to be supporting the rebels, almost complete destruction of the village by fire. Borgo Ticino: Together with the SS, murder of 12 civilians, pillage and destruction of the village by fire on the grounds that three German soldiers had been wounded by partisans. Castelletto Ticino: In order to give a demonstration of firmness against crime, a Xª MAS officer had five petty criminals publicly gunned down, having taken care to gather a large crowd in order to terrorise them. Crocetta del Montello: Episodes of torture with whips and gasoline and summary executions of partisans.

However, the Xª MAS units also earned a good combat reputation fighting on the frontline against the Allies at Anzio and on the Gothic Line. In the last months of the war Xª MAS units were dispatched to the eastern Italian border against Josip Broz Tito's partisans who marched into Istria and Venezia Giulia.

On April 26, 1945, in what is now the Piazza della Repubblica in Milan, Borghese finally ordered the Xª MAS to disband. He was soon arrested by partisans, but rescued by OSS officer James Angleton, who dressed him in an American uniform and drove him to Rome for interrogation by the Allies. Borghese was tried and convicted of war crimes, and sentenced to 12 years imprisonment, but was released from jail by the Italian Supreme Court in 1949. The Americans were keenly interested in infiltrating the Italian Communist groups, something which Borghese had done, and he was enlisted to help create counterintelligence units for the Americans.

In 2006 the admiralty of the Italian republic recognized the Xth M. A. S. RSI veterans as combatants of WWII and gave the association the battle flag. Counter operations against Italian frogmen by British frogmen in Gibraltar was the subject of a 1958 British film The Silent Enemy based on the exploits of the team of Lionel Crabb. Today the Comando Raggruppamento Subacquei e Incursori Teseo Tesei is the frogman corp currently serving the Italian Republic.