The Bretagne-class battleships were the first "super-dreadnoughts" built for the French Navy during the First World War. The class comprised three vessels: Bretagne, the lead ship, Provence, and Lorraine. They were an improvement of the previous Courbet class, and mounted ten 340 mm (13.4 in) guns instead of twelve 305 mm (12 in) guns as on the Courbets. A fourth was ordered by the Greek Navy, though work was suspended due to the outbreak of the war. The three completed ships were named after French provinces.

Bretagne was the lead ship of her class of three dreadnought battleships built in the 1910s for the French Navy. Bretagne entered service in February 1916, after the start of World War I. She spent the bulk of her nearly 25-year-long career with the Mediterranean Squadron and sometimes served as its flagship. During World War I she provided cover for the Otranto Barrage that blockaded the Austro-Hungarian Navy in the Adriatic Sea, but saw no action.