 Complete the following phrase:  On his death bed, Tiberius who had no sons proclaimed Maurice Augustus. When Tiberius died in August or October 582, Maurice succeeded as the sole emperor. He was the first emperor to speak Greek at native level since Anastasius. He married Tiberius daughter Constantina. He hired the Frankish king Childebert II to attack the Lombards, and with Frankish assistance the Romans halted the Lombard expansion in Italy. The Avars and Slavs made devastating raids as far as Marcianopolis and Thessaloniki, but both towns resisted their attack. In 590 a rebellious Persian general Bahram Chobin murdered Hormizd IV and forced his heir Khosrow II to seek asylum with the Romans. Khosrow approached Maurice for assistance and Maurice appointed the general Narses to invade the Sassanian Empire. The Romans and Khosrows supporters routed Bahram in the Battle of the Blarathon. After regaining his throne, Khosrow ceded Armenia and eastern Mesopotamia, including Dara, to the Romans. The peace allowed Maurice to relocate his troops to the Balkans and they launched a 