The Battle of Kutná Hora (Kuttenberg) was an early battle and subsequent campaign in the Hussite Wars, fought on 21 December 1421 between German and Hungarian troops of the Holy Roman Empire and the Hussites, an early ecclesiastical reformist group that was founded in what is now the Czech Republic. In 1419, Pope Martin V declared a crusade against the Hussites. One branch of the Hussites, known as the Taborites, formed a religious-military community at Tábor.