Friedrich Karl "Fritz" von Lossberg (30 April 1868 – 4 May 1942) was a German colonel, and later general, of World War I. He was a strategic planner, especially of defence, who was Chief of Staff for the Second, Third and Fourth Armies. He was present at the battles of the Somme, Arras, and Verdun Lossberg was born in Bad Homburg in Hesse-Nassau. Erich Ludendorff refers to him as Loszberg in his memoires. Elsewhere, it is sometimes also spelt Loßberg. The British Official History refers to him as a very remarkable soldier.