The Hussites were a protestant movement following the teachings of Czech reformer Jan Hus who was burned for this teaching by the spoiled Roman catholic church in Konstanz. After his death there was a large rebellion within the Czech lands (also in the southern parts of Poland) that resulted in Hussite wars ... it is one of the most famous periods of Czech history when the Czech protestants fought against the whole Catholic Europe, even Joan of Arc threatened to invade the Czech lands. Thanks to the phenomenal tactics of the commander Jan Zizka the Hussites won many battles against their enemies.
The Hussite Wars (also called the Bohemian Wars) were military actions in Bohemia in the period between 1420 and 1434. These were the first European wars, in which gunpowder weapons (muskets) were massively used. The English name for "pistol" is derived from the Hussite weapon "pistala".
The Hussite warriors were infantry who through their ingenuity and tactics defeated larger armies including heavily armoured knights. Today the Hussitan protestants form one of the largest churches within the Czech lands.