The Léon Gambetta class consisted of three armored cruisers built for the French Navy during the first decade of the 20th century. Armed with four 194-millimeter (7.6 in) guns, the ships were much larger and more powerfully armed than their predecessors. Léon Gambetta, the first of the sister ships to be completed, was initially assigned to the Northern Squadron where she served as a flagship. Her sisters Jules Ferry and Victor Hugo were assigned to the Mediterranean Squadron where Jules Ferry also served as a flagship. Léon Gambetta joined them there in 1910 and the sisters remained there for most of their careers.

The armored cruiser was a type of warship of the late 19th and early 20th centuries. It was designed like other types of cruisers to operate as a long-range, independent warship, capable of defeating any ship apart from a battleship and fast enough to outrun any battleship it encountered.