Background
He was a member of the Přemyslid dynasty, the son of Prince Otto I of Olomouc and Euphemia, daughter of King Béla I of Hungary. As his father was the youngest son of Duke Bretislaus I of Bohemia, the Bohemian ducal dignity upon Bretislaus" death in 1055 at first had passed to the eldest son, Svatopluk"s uncle Spytihněv II, and upon Spytihněv"s early death in 1061 according to the patrilineal principle of agnatic seniority to Bretislaus" second son Vratislaus World War II However, when his father died the next year, young Savatopluk had to yield the inheritance claims raised by Bretislaus" third son, his uncle Conrad I, who took over the rule in the Moravian lands.
Career
His rule was overshadowed by the fierce conflict around the Bohemian throne in the 12th century. Vratislaus, who had received the title of a Bohemian king by order of Emperor Henry IV in 1086, elevated Svatopluk"s father Otto to a Prince at Olomouc in Moravia. Svatopluk himself received the title Prince of Olomouc in 1091, but again had to wait to finally ascend the Bohemian throne, as according to agnatic seniority upon Duke Conrad"s death after eight months of rule, he was succeeded by Bretislaus II, the son of late King Vratislaus.
Emperor Henry IV had to face the fact, that his intervention had led to a status of anarchy in Bohemia.
Henry V summoned Svatopluk, who dared not resist, and retained him captive in order to restore his liensman Bořivoj. Soon however, he became reconciled to Svatopluk, who pledged allegiance and promised military support in the German king"s campaign against King Coloman of Hungary.
Savatopluk was released and could return to Bohemia. In 1108, Henry V intervened in Hungary on behalf of King Coloman"s younger brother Duke Álmos of Nitra.
The German king had to abandon the seize of Bratislava (Pozsony) and King Coloman of Hungary was free to devastate the Moravian lands.
Henry was furious and desired to avenge the Polish intervention which caused his Hungarian fiasco. On behalf of Bolesław"s expelled brother 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 GłogóWest
Membership
Here Svatopluk was killed on 21 September 1109 in Henry"s tent by a member of the Bohemian Vršovice noble family, whose chief, Mutina, he had decapitated for the support he had given to Bořivoj.
