Duke Liudolf of Swabia and his men sally out after failed peace negotiations and fight with the men of Margrave Gero for six hours during the siege of Regensburg.
Duke Magnus of Saxony and Count Hermann attempt to betray King Rudolf of Rheinfelden by uniting their troups with those of King Henry IV. prior to the battle at Flarchheim, but are found out, attacked and routed.
Duke Magnus of Saxony and his Uncle Count Hermann are captured, brought to King Henry IV. and released on the condition they swear loyalty and betray King Rudolf of Rheinfelden.