 Complete the following phrase:  Around 367, the Great Conspiracy saw the troops along Hadrians Wall mutiny, allowing the Picts to overrun the northern areas of Roman Britain in some cases joining in, in concert with Irish and Saxon attacks on the coast. The Roman provinces seem to have been retaken by Theodosius the Elder the next year, but many Romano-Britons had already been killed or taken as slaves. In 407, Constantine III declared himself emperor of the West and withdrew his legions to Gaul. The Byzantine historian Zosimus  stated that Constantines neglect of the areas defense against Irish and Saxon raids and invasions caused the Britons and Gauls to fully revolt from the Roman Empire, rejecting Roman law and reverting to their native customs. In any case, Roman authority was greatly weakened following the Visigoths 