The Queen persuaded Sigismund that Sigeric planned to kill his father and seize the throne.
The sons of Clovis took advantage of the political situation to attack the Burgundian kingdom, which now stood alone.
Meanwhile, Chlodomer ordered the death of Sigismund and with his brother Theuderic I, King at Metz, marched on Burgundy in 524.
On June 25, 524, Godomar led the Burgundians to victory over the Franks in the Battle of Vézeronce,[2] in which Chlodomer himself fell.
Three years after Sigismund's death, Godomar had his body recovered and subsequently buried in the Chapel of St. John in the Abbey of Saint-Maurice d'Agaune, the monastery that the Sigismund had founded and to which he had subsequently retreated for some time after the death of his son.