French submarine Sirène (Q123)

Jean-Marie Querville, a future admiral, served as Sirène's commanding officer from 1934 to 1936.

World War II began with the German invasion of Poland on 1 September 1939, and when France entered the war on 3 September, Sirène was a unit of the 19th Submarine Division at Toulon, France, with the submarines Naïade, Galatée, and Argonaute.[2] With the outbreak of war, the division was placed under the command of the maritime prefect of the 3rd Region.[2][4] French naval forces at Toulon primarily were concerned with opposing Italian forces in the event that Italy entered the war on Germany's side.

The Battle of France began when German ground forces advanced into France, the Netherlands, Belgium, and Luxembourg on 10 May 1940. The threat of Italian entry into the war increased thereafter, and in response the French on 26 May began stationing two Toulon-based submarines — Sirène among them — on a rotating basis at Îles d'Hyères, from which they could reach defensive patrol areas off Nice and Saint-Tropez within two hours.[2] On 1 June 1940, as tensions with Italy continued to increase, the French began stationing two submarines on the coast of Corsica, with Sirène taking station that day on alert at Calvi and Galatée at Ajaccio.[2] On 5 June, Galatée relieved Sirène at Calvi and went on one-hour alert to get underway there, while Sirène moved to Ajaccio for a rest period.[2]

Italy declared war on France on 10 June 1940 and joined the invasion of France that day. From 10 to 19 June, Sirène and Galatée took turns maintaining a defensive patrol in the Tyrrhenian Sea off Bastia and Alistro on the east coast of Corsica.[2] The submarines Céres and Pallas relieved them of this duty on 19 June 1940.[2] The Battle of France ended in France's defeat and armistice with Germany and Italy, which went into effect on 25 June 1940.

After the armistice went into effect, Sirène served in the naval forces of Vichy France. When the attack on Mers-el-Kébir — in which a British Royal Navy squadron attacked a French Navy squadron moored at the naval base at Mers El Kébir near Oran on the coast of Algeria on 3 July 1940 — took place, she was a part of Group B at Toulon along with Céres, Pallas, and the submarines Iris, Vénus, and La Sultane.[2] In response to the British attack, Group B received orders to form a patrol line from south of Ayre Island to the coast of Algeria between Ténès and Dellys with 25 nautical miles (46 km; 29 mi) between submarines, then make port at Oran.[2] On 4 July 1940, however, the submarines received orders to return to Toulon.[2] With tensions with the United Kingdom still high, Sirène, Galatée, La Sultane, and the submarines Diamant and Perle anchored on alert at Vignettes on 9 July 1940.[2]

The 19th Submarine Division was dissolved on 1 September 1940.[2] Its submarines were integrated into the 5th squadron of the 1st Submarine Force.[4]

According to one source, Sirène was decommissioned in September 1940 and placed under guard at Toulon in accordance with the terms of the 1940 armistice.[2] According to another, she was decommissioned on 1 July 1941.[4] She subsequently was cannibalized for spare parts for other submarines.[2] Unable get underway when Germany and Italy occupied the Free Zone (French: Zone libre) of Vichy France on 27 November 1942, Sirène was among the French vessels scuttled at Toulon to prevent their seizure by Germany when German forces entered Toulon that day.[1][2]

Wikimedia Commons has media related to Sirene-class submarine.

• Bagnasco, E :Submarines of World War Two (1977) ISBN 0-85368-331-X
• Conway : Conway's All the World's Fighting Ships 1922–1946 (1980) ISBN 978-0-85177-146-5
• Moulin, Jean (2006). Les sous-marins français (in French). Rennes: Marines Éditions. ISBN 2-915379-40-8., pp. 22–23.