3. Narses: The 80-Year-Old General
Narses lived from 478 to 573 CE and served the Byzantine Empire under Emperor Justinian I. He started as a palace official but became a military commander with no previous battle experience. At age 74, he led Byzantine armies against the Ostrogoths in Italy and won, defeating the much younger Gothic king Totila in 552 CE. Despite his advanced age, he showed tactical brilliance that surprised both allies and enemies, reclaiming territories that had been lost for decades.
