Original: Under the reign of the Ottonian rulers, the kingdom of the Eastern Franks finally became Germany with the conclusion of the unification of the duchies of Lorraine, Saxony, Franconia, Swabia, Thuringia and Bavaria into one empire.
Simplified: Under the reign of the Ottonian rulers, the kingdom of the Eastern Franks finally became Germany as the duchies of Lorraine, Saxony, Franconia, Swabia, Thuringia and Bavaria joined in one empire.