In the spring of 1421, Zisca commenced the campaign, as before, by destroying all the monasteries in his way. He laid siege to the castle of Wisgrade, and the emperor coming to relieve it, fell into a snare, was defeated with dreadful slaughter, and this important fortress was taken. Our general had now leisure to attend to the work of reformation, but he was much disgusted with the gross ignorance and superstition of the Bohemian clergy, who rendered themselves contemptible in the eyes of the whole army. When he saw any symptoms of uneasiness in his camp, he would spread alarm in order to divert them, and draw his men into action. In one of these expeditions, he encamped before the town of Rubi, and while pointing out the place for an assault, an arrow shot from the wall struck him in the eye. At Prague it was extracted, but, being barbed, it tore the eye out with it. A fever succeeded, and his life was with difficulty preserved. He was now totally blind, but still desirous of attending the army. The emperor having summoned the states of the empire to assist him, it was resolved, with their assistance, to attack Zisca in the winter, when many of his troops departed till the return of spring. The confederate princes undertook the siege of Soisin, but at the approach merely of the Bohemian general, they retreated. Sigismond nevertheless advanced with his formidable army, consisting of 15,000 Hungarian horse and 25,000 infantry, well equipped for a winter campaign. This army spread terror through all the east of Bohemia. Wherever Sigismond marched, the magistrates laid their keys at his feet, and were treated with severity or favour, according to their merits in his cause. Zisca, however, with speedy marches, approached, and the emperor resolved to try his fortune once more with that invincible chief. On the 13th of January, 1422, the two armies met on a spacious plain near Kamnitz. Zisca appeared in the centre of his front line, guarded, or rather conducted, by a horseman on each side, armed with a pole-axe. His troops having sung a hymn with a determined coolness drew their swords, and waited for a signal. When his officers had informed him that the ranks were all well closed, he waved his sabre round his head, which was the sign of battle. This battle is described as a most awful sight. The extent of the plain was one continued scene of disorder. The imperial army fled towards the confines of Moravia, the Taborites, without intermission, galling their rear. The river Igla, then frozen, opposed their flight. The enemy pressing furiously, many of the infantry, and in a manner the whole body of the cavalry attempted the river. The ice gave way and not fewer than 2000 were swalled up in the water. Zisca now returned to Tabor, laden with all the spoils and trophies which the most complete victory could give.