The Bouclier class, or Casque class, was a class of twelve destroyers of the French Navy built between 1910 and 1912, four of which were lost during the First World War. This 800-tonne class were built by various shipyards to a general specification that included oil-fired boilers and steam turbines. This allowed for some variations in size (from in length) and machinery (Bouclier and Casque had three shafts, all the others had two, while Casque has three funnels, all the rest had four). Speeds also varied, Bory was the slowest at only , while Bouclier achieved in trails.