According to the contemporary Chronicle of Fredegar, the Battle of Wogastisburg was a battle between Slavs (Sclav, cognomento Winidi) under King Samo and Franks under King Dagobert I in 631. The Frankish armies advanced into the area of the Slavic tribal union in three streams - Alamanni, Lombards, and Austrasian Franks. The first two were quite successful, but the main fighting force was defeated in a three-day battle near a place referred as Wogastisburg.