HMS Warspite was one of five Queen Elizabeth-class battleships built for the Royal Navy during the early 1910s. Completed during the First World War in 1915, she was assigned to the Grand Fleet and participated in the Battle of Jutland. Other than that battle, and the inconclusive Action of 19 August, her service during the war generally consisted of routine patrols and training in the North Sea. During the interwar period the ship was deployed in the Atlantic Ocean and the Mediterranean Sea, often serving as flagship, and was thoroughly modernised in the mid-1930s.