[2] Schwerer was promoted to ensign (enseigne de vaisseau) on 5 October 1883 in the port of Lorient, and was assigned to the corvette Eumenide.

He was posted to the Albatros in January 1887, then was admitted to the Corps des Elèves Officiers aux Fusiliers Marins in Lorient.

[2] In July 1895, during a voyage that researched terrestrial magnetism on the Dubourdieu, Schwerer wrote his Instructions théoriques et pratiques sur l’horizon gyroscopique.

In June 1896 on the Drôme he was in charge of preliminary soundings for laying a transatlantic cable between Boston and Brest.

In July 1903 on the Masséna he was aide de camp to Admiral Léonce Albert Caillard, commander of the North Squadron.

He was a member of the commission of inquiry appointed by Paul Painlevé, president of the navy committee, after the explosions of the battleships Iéna on 12 March 1907 and Liberté on 25 September 1911.

[2] Schwerer was made Deputy Chief of Staff of the Navy on 20 May 1914 under Rear Admiral Louis-Joseph Pivet.

[2] After the outbreak of World War I (1914–18), on 6 August 1914 Schwerer and Prince Louis of Battenberg signed a convention in London on the division of responsibilities between the two navies.

[3] The convention confirmed the terms of the Entente Cordiale, and placed France in command of all naval operations in the Mediterranean.

In the event that Austria entered the war France would act against its naval forces, and would at minimum prevent them passing the Strait of Otranto.

On 4 June 1917 he was given command of the ocean and channel patrols, with the duties of protecting convoys and fighting submarines.

[2] In July 1919 Schwerer was a member of the Supreme Council of the Navy and Inspector General of Military Personnel of the Fleet.

[1] In his memoirs, published in 1933, Schwerer states that he rejected the French Third Republic in favour of royalism at an early age.

[6] After his retirement in 1924 Schwerer devoted himself to the royalist League of the Action francaise, becoming one of the movement's most active leaders.

[1] At the December 1931 congress, "greeted by loud acclamation", he gave a full presentation of "the general situation of France", external, financial, economic, interior and religious.

There will always be imbeciles in France, men of bad faith, madmen and criminals; but there are in our midst many excellent elements now deceived and blinded.

We will not do it by sitting in a good armchair, in flowery salons, lavishing sweet smiles and honeyed words, fighting in white gloves with dainty foils.