 In late 293, Constantius defeated the forces of Carausius in Gaul, capturing Bononia (Boulogne-sur-Mer).This precipitated the assassination of Carausius by his "rationalis" Allectus, who assumed command of the British provinces until his death in 296.Constantius spent the next two years neutralising the threat of the Franks who were the allies of Allectus, as northern Gaul remained under the control of the British usurper until at least 295.