 The many battles in the 15th century are probably why Ilsfeld was surrounded by a high wall with ten towers.Ilsfeld suffered greatly in the wars of the 16th and 17th centuries.In 1519, Duke William IV of Bavaria quartered his army there; during the Thirty Years' War there were outbreaks of plague in 1626 and 1634 and Imperial troops were quartered there in 1638/39; and in 1645 it was plundered by French, Hessian and Weimar troops.