Explanation: The Hussites were a religious movement based in what-is-now Czechia during the 15th century AD. Protesting the perceived hypocrisy and waste of the Catholic Church, they insisted, after their leader Jan Hus was burned at the stake for heresy, on forming a separate church hierarchy and theology. The Catholic Church did not like this, and called several crusades to bring the Hussites back into the 'loving' arms of the Catholic Church.

All of the called crusades failed, despite the Hussites being a regional movement made up largely of peasant militia, and the Catholic Church dominating most of Europe and having the loyalty of much of the warrior-caste nobility.

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Another historic example that the Catholic Church is a religion of money and power ... and has little to do with any historic middle eastern religion