Complex sentence: With Charlemagne's conquest of the Lombards in 776, nearly all continental Germanic speaking peoples had been incorporated into the Frankish Empire, thus also bringing all continental West Germanic speakers under Frankish rule.
Split into simpler sentences: With Charlemagne's conquest of the Lombards in 776, nearly all continental Germanic speaking peoples had been incorporated into the Frankish Empire. Thus also bringing all continental West Germanic speakers under Frankish rule.