 The war was intertwined with a rebellion by Michael Glinski, Court Marshal of Lithuania, a favorite of Alexander Jagiellon and a man of opportunity.When Sigismund I the Old succeeded Alexander in 1506, he did not show the same favors to Glinski.Jan Jurjewicz Zabrzeziński, Voivode of Trakai and Glinki's old political opponent, accused Glinski of treason – he alleged that Glinski poisoned Grand Duke Alexander and had ambitions of becoming king himself.