Tiberius III was Byzantine emperor from 15 February 698 to 10 July or 21 August 705 AD. Little is known about his early life, other than that he was droungarios, a mid-level commander, of the Cibyrrhaeots, and that his birth name was Apsimar. In 696, Tiberius was part of an army led by John the Patrician sent by Byzantine Emperor Leontios to retake the city of Carthage in the Exarchate of Africa, which had been captured by the Arab Umayyads. After seizing the city, this army was pushed back by Umayyad reinforcements and retreated to the island of Crete; some of the officers, fearing the wrath of Leontios, killed John and declared Tiberius emperor. Tiberius swiftly gathered a fleet, sailed for Constantinople, and deposed Leontios. Tiberius did not attempt to retake Byzantine Africa from the Umayyads, but campaigned against them along the eastern border with some success. In 705 former Emperor Justinian II, who had been deposed by Leontios, led an army of Slavs and Bulgars to Constantinople, and after entering the city secretly, deposed Tiberius. Tiberius fled to Bithynia, but was captured several months later and beheaded between August 705 and February 706.