Avar Khaganate
Maurice's campaigns put an end to Avar dreams of hegemony over the Balkans and paved the way for an end of the Avar threat. The Khagan's power collapsed only after the unsuccessful Siege of Constantinople in 626, and the Avar Khaganate would be finally destroyed much later, by Charlemagne in (791–803). The Avar Khaganate Empire ceased to exist after 790. The Muslim conquests, in the 630s onward, led to the loss of all of Rome's long-held eastern provinces since BCE 1st century southeast to Taurus Mountains. The constant Arab threat over strategically important Asia Minor had a great impact on the Balkans. Several decades were to pass before Constantinople could regain the initiative and reconquer parts of the Slav-controlled areas ("Sklavinia"). Several centuries were to pass before Basil II restored, by fire and sword, all of the Balkans to Byzantine control.