https://en.wikipedia.org/wiki/Jan_Žižka

Jan Žižka z Trocnova a Kalicha (English: John Zizka of Trocnov and the Chalice; c. 1360 – 11 October 1424) was a Czech military leader and Knight who was a contemporary and follower of Jan Hus, and a prominent Radical Hussite who led the Taborite faction during the Hussite Wars. Renowned for his exceptional military skill, Žižka is celebrated as a Czech national hero. Žižka led the Hussite forces in battles against three crusades and remained undefeated throughout his military career.