Karl Rudolf Gerd von Rundstedt (12 December 1875 – 24 February 1953) was a German Generalfeldmarschall (Field Marshal) in the Heer (Army) of Nazi Germany during World War II. Born into a Prussian family with a long military tradition, von Rundstedt entered the Prussian Army in 1892. During World War I, he served mainly as a staff officer. In the interwar period, he continued his military career, reaching the rank of Colonel General (Generaloberst) before retiring in 1938. He was recalled at the beginning of World War II as commander of Army Group South in the invasion of Poland.
https://en.wikipedia.org/wiki/Gerd_von_Rundstedt