Svatopluk, Duke of Bohemia
…Zbigniew, he invaded Poland, again with the support of Svatopluk, who led a Bohemian army across the Sudetes into Silesia to join the German forces at the Battle of Głogów. Here Svatopluk was killed on 21 September 1109 in Henry's tent by a member of the Bohemian Vršovice noble family named John, whose chief Mutina he had…