Dagobert, in his dealings with the Saxons, Alemans, and Thuringii, as well as the Slavs beyond the borders of Francia, upon whom he tried to force tribute but who instead defeated him under their king Samo at the Battle of Wogastisburg in 631, made all the far eastern peoples subject to the court of Neustria and not of Austrasia. This, first and foremost, incited the Austrasians to request a king of their own from the royal household.