579. Maurice, commanding the Romans, is victorious over the Persians.
580. Further successes of Maurice in Mesopotamia.
582. Death of Tiberius and accession of Maurice, Emperor in the East.
584. Many native Gauls retire into Armorica, where they preserve their Celtic tongue.
586. Cridda founds the last Saxon kingdom of Mercia. The Britons retire to the western side of the island, unite in a general league, and call themselves Cymri.
588. Northumberland is founded by the union of the kingdoms of Bernicia and Deira, under Ethelric.
589. Arianism is abandoned by the Visigoths in Spain. 591. Peace between Persia and the Eastern Empire.
597. Augustine sent by Gregory the Great to preach Christianity to the Anglo-Saxons. See [AUGUSTINE'S MISSIONARY WORK IN ENGLAND], iv, 182.
602. Revolt in Constantinople; Phocas is proclaimed emperor; flight of Maurice with his family; they are taken and put to death.
603. Khusrau, the Persian ruler, declares war against Phocas to revenge the death of his benefactor, Maurice.