abstract
| - The Byzantine Empire's military position in the Balkans collapsed in the early 7th century as a result of disastrous military ventures against the Persians and then the Arabs in the East, which forced the effective abandonment of the Danube limes and opened the way for large-scale penetration of the Balkan hinterland by various Slavic tribes. The Slavs raided as far as southern Greece and the coasts of Asia Minor, and settled across the Balkan peninsula. Most of the region's cities were sacked or abandoned and only a few, including Thessalonica, remained occupied and in imperial hands. In Greece, the eastern coasts of the Peloponnese and Central Greece remained in Byzantine hands as the theme of Hellas, while in the interior, various Slavic groups established themselves. A large native Greek population probably also remained in the land, either mixed with the Slavs or in its own autonomous communities. As elsewhere in Greece, a mostly peaceful modus vivendi soon emerged between the Slavs and the remaining Byzantine strongholds, with the mainly agricultural Slavs trading with the Byzantine-held coastal towns. Further north, in the Greek mainland, by the turn of the 8th century smaller Slavic districts or sclaviniae emerged around the fringes of imperial territory, ruled by their own archons, who received Byzantine titles and recognized some form of imperial suzerainty. Imperial authority across Greece was greatly strengthened by the 783 campaign of the logothete Staurakios, who ventured from Constantinople overland to Thessalonica and from there south to the Peloponnese, subduing the Slavs of those regions. Patras, on the northwestern coast of the Peloponnese, is claimed by the Chronicle of Monemvasia—a work of highly disputed accuracy and chronology, but an essential source for the period—to have been one of the cities abandoned circa 587/8 as a result of the Slavic depredations, its population fleeing to Rhegion in Calabria. This was followed by 218 years of independent Slavic rule in the Peloponnese, until around 804/5. The archaeological record shows Patras to have remained in Byzantine control throughout the period, although it is possible that part of the population indeed emigrated to Italy.
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