Voltaire was one of the six Danton-class semi-dreadnought battleships built for the French Navy in the first decade of the 20th century. Shortly after World War I began, the ship participated in the Battle of Antivari in the Adriatic Sea and helped to sink an Austro-Hungarian protected cruiser. She spent most of the rest of the war blockading the Straits of Otranto and the Dardanelles to prevent German, Austro-Hungarian and Turkish warships from breaking out into the Mediterranean. Voltaire was hit by two torpedoes fired by a German submarine in October 1918, but was not seriously damaged. After the war, she was modernized in 1923–1925 and subsequently became a training ship. She was condemned in 1935 and later sold for scrap.

The Danton-class battleship was a class of six semi-dreadnought battleships built for the French Navy before World War I. The ships were assigned to the Mediterranean Fleet after commissioning in 1911. After the beginning of World War I in early August 1914, five of the sister ships participated in the Battle of Antivari. They spent most of the rest of the war blockading the Straits of Otranto and the Dardanelles to prevent warships of the Central Powers from breaking out into the Mediterranean. One ship was sunk by a German submarine in 1917.