The Hussite Wars, also called the Bohemian Wars or the Hussite Revolution, were a series of civil wars fought between the Hussites and the combined Catholic forces of Holy Roman Emperor Sigismund, the Papacy, and European monarchs loyal to the Catholic Church, as well as various Hussite factions. At a late stage of the conflict, the Utraquists changed sides in 1432 to fight alongside Roman Catholics and opposed the Taborites and other Hussite factions. These wars lasted from 1419 to approximately 1434.
The unrest began after pre-Protestant Christian reformer Jan Hus was executed by the Catholic Church in 1415 for heresy. Because Sigismund had plans to be crowned the Holy Roman Emperor (requiring papal coronation), he suppressed the religion of the Hussites, yet it continued to spread. When King Wenceslaus IV of Bohemia, brother of Sigismund, died of natural causes a few years later, the tension stemming from the Hussites grew stronger. In Prague and various other parts of Bohemia, the Catholic Germans living there were forced out.