Carl Adolf Maximilian Hoffmann (25 January 1869 – 8 July 1927) was a German military strategist. As a staff officer at the beginning of World War I, he was Deputy Chief of Staff of the 8th Army, soon promoted Chief of Staff. Hoffmann, along with Hindenburg and Ludendorff, masterminded the devastating defeat of the Russian armies at Tannenberg and the Masurian Lakes. He then held the position of Chief of Staff of the Eastern Front. At the end of 1917, he negotiated with Russia to sign the Treaty of Brest-Litovsk.