In 807 it was able without external assistance to defeat the Slavonians (Avars), though most of the credit of the victory was assigned to St Andrew, whose church was enriched by the imperial share of the spoils, and whose archbishop was made superior of the bishops of Methone, Lacedaemon and Corone.
The native population is of the most diverse origin; the foreign element is equally heterogeneous, but more than half (in 1900, 14,172 out of 24,283 foreign-born) are Mexicans, many of whom are not permanent residents; after 1900, immigrants were largely mine labourers, and included Slavonians and Italians.
A formal treaty was then concluded, which the Slavonians swore to observe in the names of their gods Perun and Volos.
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