 Later Samo and the Slavs came into conflict with the Frankish empire whose ruler Dagobert I wanted to extend his rule to the east, but Dagobert was defeated in the memorable battle of Wogastisburg in 631.To this day, historians are searching in vain for this stronghold's actual location.Over the next five years Samo and the Slavs undertook raids on Frankish territory, but no one knows exactly how far to the northeast Samo's power eventually reached, probably beyond the boundaries of today's Czech Republic.