Mieszko II

1031. The emperor, with a small army of Saxons, attacked the Slavs in autumn and compelled Mieszko, who had resisted him a long time, to restore the 'Lusizi' region with several burgs and the booty, which was taken in Saxony in previous years, and to confirm the peace by an oath.1
1032. ... while the emperor was leading an army against Miesco, the king of those Slavs who are called Poles, ...2