Zhishka's Military Brilliance

Zhishka was made into one of the commanders of the nascent Hussite forces. He ordered all the wagons that his troops were travelling to be drawn up together like a wall in a thick and marshy area. Then he loaded the wagons with primitive gunpowder weapons, and ordered them to fire on the approaching crusaders using the wagons as cover. And this position and these tactics actually saw Zhishka and his Hussites, if you'll believe it, win the day.