Oberste Heeresleitung

The Oberste Heeresleitung or OHL (Supreme Army Command) was Germany's highest echelon of command of the German Army (Heer) in World War I, while the Navy was led by the Seekriegsleitung or SKL (Naval Warfare Command).

The law made Kaiser Wilhelm II the Supreme Commander of the German Army, but the generals at the OHL made decisions largely on their own. At the end of the war they had practically superseded the government as the center of political power. Co-ordination was poor at the beginning of the war between the OHL and the SKL: for instance the Imperial navy did not know about the Schlieffen plan, which planned an attack on France through Belgium.

At the start of the First World War, the Chief of the OHL was Helmuth von Moltke. He then had to resign after the failure of the Marne offensive. The Prussian War minister Erich von Falkenhayn was appointed as his successor. He advocated a "war of attrition" (Abnutzungsschlacht) which showed its limitations in the Battle of Verdun.