Karl Rudolf Gerd von Rundstedt (12 December 1875 – 24 February 1953) was a German Generalfeldmarschall (Field Marshal) in the Heer (Army) of Nazi Germany and Oberbefehlshaber West (Commander-in-Chief in the West) during World War II. At the end of the war, aged 69, with over 52 years of service, he was the Army's most senior officer. Born into a Prussian family with a long military tradition, Rundstedt entered the Prussian Army in 1892. During World War I, he served mainly as a staff officer.
https://en.wikipedia.org/wiki/Gerd_von_Rundstedt