After the war, Grossi fled abroad. A first enquiry in 1949 summarily concluded that Grossi and his crew had imagined everything, and stripped him of the promotions and medals he had received for the actions. Subsequently, in 1962 a new enquiry (motivated by imprecisions of the first one, also accused of being motivated by political reasons) concluded that the crew of the Barbarigo might have been under the belief of a successful attack, but criticized Grossi for his certainty about his sinkings, and did not restore his promotions and awards.[2]
It was established that in the first attack, Grossi had unsuccessfully attacked the cruiser USS Milwaukee (CL-5), while on the second instance he had fired torpedoes at the corvette HMS Petunia (K79), which likewise missed.[3]
Awards
Italian
Silver Medal for Military Valor (24 September 1940)
^Giorgerini, Giorgio (2002). Uomini sul fondo : storia del sommergibilismo italiano dalle origini a oggi. Milano: Mondadori. pp. 535–43. ISBN8804505370.
Fellgiebel, Walther-Peer (2000) [1986]. Die Träger des Ritterkreuzes des Eisernen Kreuzes 1939–1945 — Die Inhaber der höchsten Auszeichnung des Zweiten Weltkrieges aller Wehrmachtteile [The Bearers of the Knight's Cross of the Iron Cross 1939–1945 — The Owners of the Highest Award of the Second World War of all Wehrmacht Branches] (in German). Friedberg, Germany: Podzun-Pallas. ISBN978-3-7909-0284-6.