Upon his father's death, Theudebert had to fight both his uncles Childebert and Clotaire to inherit his father's kingdom.
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In about 516 he defeated a Danish army under King Chlochilaich (Hygelac of Beowulf) after it had raided northern Gaul.
The site was never unoccupied until Théodebert, future king of Austrasia left the castle to crown himself, accompanied by Deoteria, Countess of Cabrières.