https://militaryhistorynow.com/2017/02/15/the-war-of-snails-10-curious-facts-about-the-german-peasants-revolt/
In late 1524 a zealous protestant preacher named Thomas Muntzer founded ‘The Eternal League of God.’ The banner of this peasant militia was white flag emblazoned with both a rainbow and the slogan God‘s Word will endure forever. But at Frankenhausen, on the May 11, 1525, Muntzer and his men were slaughtered by an army of well-equipped landsknecht mercenaries who’d been hired by the nobles to crush the revolt. Muntzer was captured, tortured and beheaded. The landsknechts lost just four men killed and two wounded.