 Pope Leo X reacted by hastily hiring an army of 10,000 troops under Lorenzo II de' Medici, Renzo da Ceri, Giulio Vitelli, and Guido Rangoni and sent it against Urbino.Lorenzo was wounded by a bullet from an arquebus on April 4 during the siege of the Mondolfo castle, and returned to Tuscany.He was replaced by Cardinal Bibbiena.