How did the Hussite Wars begin after the death of Jan Hus?

Following the death of Jan Hus at the stake in 1415, the religious reform movement he inspired—now known as the Hussite movement—grew rapidly as followers reacted with outrage against the Council of Constance, the conservative clergy, and the future Holy Roman Emperor Sigismund.1

The situation escalated into the Hussite Wars due to several key factors:

• Political Crisis: The death of King Wenceslas IV in 1419 triggered a succession crisis. The Hussites vehemently opposed Sigismund’s claim to the Bohemian throne, while Czech Catholics and the German minority supported him.1
• Religious Conflict: Sigismund, backed by the papacy and various German princes, was determined to suppress the Hussite movement, leading to over a decade of bitter military struggle.1
• Crusades: The Roman Catholic Church launched a series of crusades against the Hussites. In response, the Hussites—including both moderate Utraquists and radical Taborites—united to defend Bohemia, successfully repelling these invasions.1

These conflicts were characterized by deep-seated ethnic and religious tensions, eventually leading to internal divisions among the Hussites themselves, culminating in the Battle of Lipany in 1434.1