Arrival of the Slavs

The Byzantines broadly grouped the numerous Slav tribes into two groups: the Sklavenoi and Antes.^[6] Apparently, the Sklavenoi group were based along the middle Danube, whereas the Antes were at the lower Danube, in Scythia Minor. Some, such as Bulgarian scholar Zlatarsky, suggest that the first group settled the western Balkans, whilst offshoots of the Antes settled the eastern regions (roughly speaking).^[6] From the Danube, they commenced raiding the Byzantine Empire from the 520s, on an annual basis. They spread about destruction, taking loot and herds of cattle, seizing prisoners and taking fortresses. Often, the Byzantine Empire was stretched defending its rich Asian provinces from Arabs, Persians and Turks. This meant that even numerically small, disorganised early Slavic raids were capable of causing much disruption, but could not capture the larger, fortified cities on the Aegean coast.

The Slavs invaded Balkans during Justinian I rule (527–565), when eventually up to 100,000 Slavs raided Thessalonica. The Western Balkans was settled with Sclaveni (Sklavenoi), the east with Antes.^[6]

The Sklavenoi plundered Thrace in 545.^[7] In 551, the Slavs crossed Niš initially headed for Thessalonica, but ended up in Dalmatia. During the 6th and 7th century, Slavic tribes made eight attempts to take Niš and in the final attack in 615 the Slavs took the city.^[8]

Menander Protector mentions a King of the Sklavenoi, Daurentius (577-579) that slayed an Avar envoy of Khagan Bayan I. The Avars asked the Slavs to accept the suzerainty of the Avars, he however declined and is reported as saying: "Others do not conquer our land, we conquer theirs [...] so it shall always be for us".^[9]

In 577 some 100,000 Slavs poured into Thrace and Illyricum, pillaging cities and settling down.^[10] By the 580s, as the Slav communities on the Danube became larger and more organised, and as the Avars exerted their influence, raids became larger and resulted in permanent settlement. In 586 AD, as many as 100,000 Slav warriors raided Thessaloniki. By 581, many Slavic tribes had settled the land around Thessaloniki, though never taking the city itself, creating a Macedonian Sclavinia.^[11] As John of Ephesus tells us in 581: "the accursed people of the Slavs set out and plundered all of Greece, the regions surrounding Thessalonica, and Thrace, taking many towns and castles, laying waste, burning, pillaging, and seizing the whole country." However, John exaggerated the intensity of the Slavic incursions since he was influenced by his confinement in Constantinople from 571 up until 579.^[12] Moreover, he perceived the Slavs as God's instrument for punishing the persecutors of the Monophysites.^[13] By 586, they managed to raid the western Peloponnese, Attica, Epirus, leaving only the east part of Peloponnese, which was mountainous and inaccessible. In Maurice's Balkan campaigns, the final attempt to restore the northern border was from 591 to 605, when the end of conflicts with Persia allowed Emperor Maurice to transfer units to the north. However he was deposed after a military revolt in 602, and the Danubian frontier collapsed one and a half decades later.

Archaeological evidence in Serbia and Macedonia conclude that the White Serbs may have reached the Balkans earlier than thought, between 550 and 600, as much findings; fibulae and pottery found at Roman forts point at Serb characteristics and thus could have been either part of the Byzantine foedorati or a fraction of the early invading Slavs who upon organizing in their refuge of the Dinarides, formed the ethnogenesis of Serbs and were pardoned by the Byzantine Empire after acknowledging their suzerainty.^[7]