Carl Friedrich Heinrich Reinhard Scheer (30 September 1863 – 26 November 1928) was an admiral in the Imperial German Navy (Kaiserliche Marine). Scheer joined the navy in 1879 as an officer cadet and progressed through the ranks, commanding cruisers and battleships, as well as senior staff positions on land. At the outbreak of World War I, Scheer was the commander of the II Battle Squadron of the High Seas Fleet. He then took command of the III Battle Squadron, which consisted of the newest and most powerful battleships in the navy. In January 1916, he was promoted to admiral and given control of the High Seas Fleet. Scheer led the German fleet at the Battle of Jutland on 31 May – 1 June 1916, one of the largest naval battles in history.
Following the battle, Scheer joined those calling for unrestricted submarine warfare against the Allies, a move the Kaiser eventually permitted. In August 1918, Scheer was promoted to the chief of Naval Staff; Admiral Franz von Hipper replaced him as commander of the fleet. Together they planned a final battle against the British Grand Fleet, but war-weary sailors mutinied at the news and the operation was abandoned.