| BETASOM | |
|---|---|
Bordeaux Sommergibili | |
| Bordeaux, France | |
 | |
  BETASOM | |
| Coordinates | 44°52′03″N 0°33′34″W / 44.867534°N 0.559341°W |
| Type | Submarine base |
| Site information | |
| Controlled by |  Kingdom of Italy |
| Site history | |
| In use | August 1940 – September 1943 |
| Battles/wars | Battle of the Atlantic |
| Garrison information | |
| Past commanders | Angelo Parona (August 1940 – September 1941) Romolo Polacchini (September 1941 – December 1942) Enzo Grossi (December 1942 – September 1943) |
| Garrison | 1,600 |
| Occupants | Regia Marina |
BETASOM (an Italian language acronym of Bordeaux Sommergibile or Sommergibili)[a] was a submarine base established at Bordeaux, France by the Regia Marina during the Second World War. From this base, Italian submarines participated in the Battle of the Atlantic from 1940 to 1943 as part of the Axis anti-shipping campaign against the Allies.
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