The Sorbs, also known as Serbs or White Serbs in Serbian historiography, were an Early Slavic tribe settled between the Saale-Elbe valley and the Lusatian Neisse (in present-day Saxony and Thuringia). They were part of the Polabian Slavs and Wends group of Early Slavs. In the 7th century CE, the tribe joined Samo's Empire, and some Sorbs emigrated from their homeland (White Serbia) to Southeast Europe. The tribe is last mentioned in the late-10th century, but its descendants can be found among Germanized people of Saxony, among the Slavic ethnic group of the Sorbs in Lusatia, and among the Serbs of Southeastern Europe.