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660 CE 670 CE 680 CE
668 CE - 685 CE: Reign of Byzantine emperor Constantine IV.
674 CE - 678 CE: The Arab Umayyad Caliphate unsuccessfully besieges Constantinople.
678 CE: First recorded use of Greek Fire in Byzantine warfare during the Arab siege of Constantinople.
679 CE: The Umayyad Caliphate is obliged by treaty to give up former Byzantine territories in the Aegean.
680 CE: A Byzantine naval fleet is defeated by the Bulgars.
680 CE - 681 CE: The Sixth Ecumenical Council in Constantinople declares the end of Monotheletism and Monoenergism.
681 CE: Byzantine emperor Constantine IV signs a peace treaty with the Bulgars.