The Anglo-Saxon period refers to the time between the 5th century and the Norman conquest of 1066. During this period, Germanic tribes known as the Angles, Saxons and Jutes migrated to Britain and established Anglo-Saxon kingdoms, bringing their own language Old English. Key events included the conversion of the Anglo-Saxons to Christianity in the late 6th/7th centuries and the unification of England under Alfred the Great and his successors in the 9th century.