In 293 Carausius was isolated when the western Caesar, Constantius Chlorus, retook some of his Gallic territories, particularly the crucial port of Bononia (modern Boulogne), and defeated his Frankish allies in Batavia.
Pada 293, Carausius terjepit ketika Caesar barat, Konstantius Klorus, mencaplok beberapa wilayah kekuasaan Galia-nya, terutama pelabuhan penting Bononia (sekarang Boulogne), dan mengalahkan sekutu Frank-nya di Bayern.