At a decisive moment , a German cavalry force of 200 riders , commanded by Ulrich von Kapellen , ambushed .
At a decisive moment , a German cavalry force of 200 riders , commanded by Ulrich von Kapellen , attacked the Bohemian right flank from the rear .
At a decisive moment , a German cavalry force of 200 riders , commanded by Ulrich von Kapellen , ambushed and attacked the Bohemian right flank from the rear .