Chlothar II
The Austrasia-Burgundy union lasted only until 595, when the death of Childebert II brought it to an end. His realm was then split between his two sons: Theudebert II inherited Austrasia, while Theuderic II received the kingdom of Burgundy. The two brothers then campaigned united against their cousin Chlothar II of Neustria, but their alliance lasted only until 599, when they took up arms against each other.