Chlothar I
Amalaberga is said to have encouraged Hermanfrid to make war on his brothers and become sole ruler. Bertachar was killed in battle, possibly as early as 525. Hermanfrid then sought the help of Theuderic I, the Merovingian king of Austrasia, to attack Baderic and seize control of all of Thuringia. After Baderic was defeated and beheaded by the Franks, Hermanfrid reneged on certain promised land concessions. Theuderic then persuaded his brother, Chlothar I, Merovingian king at Soissons, to join him in attacking Hermanfrid. Clothar had married Baderic's daughter, Ingund, and later, his daughter, Aregund.