Gratian was the name of an usurper emperor in Roman Britain during the early 5th century AD Principal sites in Roman Britain Roman Britain is the term applied to the historical period when Britain was under Roman rule, usually considered AD 44 to 410. ... (4th century - 5th century - 6th century _ other centuries) Events Rome sacked by Visigoths in 410. ...

Following the death of Marcus he was acclaimed as emperor by the army in Britain in early AD 407. His background, as recorded by Orosius, was that he was a native Briton and one of the urban aristocracy. He ruled for four months at a time when a huge barbarian invasion was taking place in Gaul. On the last day of December 406, an army of Vandals, Alans and Sueves had crossed the frozen Rhine. During 407, they spread across northern Gaul towards Boulogne, and Zosimus wrote that the troops in Britain feared an invasion across the English Channel. Events Gunderic becomes king of the Vandals and the Alans after the death of his father Godgisel Gratianus of Britain is assassinated and Constantine III takes his place at the head of the mutinous Roman garrison in Britain. ... Paulus Orosius (c. ... Gallia (in English Gaul) is the Latin name for the region of western Europe occupied by present-day France, Belgium, western Switzerland and the parts of the Netherlands and Germany on the west bank of the Rhine river. ... Events December 31 - Vandals, Alans and Suebians cross the Rhine, beginning an invasion of Gallia Roman legions in Britain mutiny against the Roman Emperor and select Marcus as new Roman Emperor. ... The Vandals were an East Germanic tribe that entered the late Roman Empire, and created a state in North Africa, centered on the city of Carthage. ... Alan can refer to any of the following: Alan (Sesame Street), the character in the television series Sesame Street Alans, an ancient nomadic people Alan, Haute-Garonne, a commune in the Haute-Garonne département in France where tourists can see medieval monuments: a castel named THE COW OF ALAN and... The Rhine canyon (Ruinaulta) in Graubünden in Switzerland Length 1. ... Boulogne is the name of several communes in France: Boulogne in the Vendée département Boulogne-Billancourt, in the Hauts-de-Seine département Boulogne-sur-Mer, in the Pas_de_Calais département This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... For the pope of this name see Pope Zosimus Zosimus, Greek historical writer, nourished at Constantinople during the second half of the 5th century A.D. According to Photius, he was a count, and held the office of advocate of the imperial treasury. ... The English Channel ( French:La Manche) is the part of the Atlantic Ocean that separates the island of Great Britain from northern France, and joins the North Sea to the Atlantic Ocean. ...

The army wanted to cross to Gaul and stop the barbarians but Gratian ordered them to remain. Unhappy with this, the troops killed him and chose Constantine III as their leader. Constantine III declared himself emperor in the West (407–411). ...

Geoffrey of Monmouth describes a similar character, named Gracianus Municeps, who is likely the same figure. Geoffrey of Monmouth was a clergyman and one of the major figures in the development of British history. ... Gracianus Municeps was a legendary king of the Britons after the death of Emperor Magnus Maximus, according to Geoffrey of Monmouth. ...