c. 250–306
Constantius Chlorus was a Roman tetrarch and emperor who restored Britain to central imperial rule in 296. His invasion ended the breakaway regime founded by Carausius and continued by Allectus.
Constantius became Caesar in the Tetrarchy in 293, recovered Britain from the regime of Allectus in 296 and later became Augustus; he died at York in 306, where his troops proclaimed his son Constantine emperor.
Rosemary Sutcliff’s The Silver Branch follows resistance to Allectus in a Britain that has broken away from imperial control and points toward the restoration of the province under Constantius Chlorus, whose western government represents the returning legitimate empire. Ian Ross’s War at the Edge of the World places Constantius directly in the final years of the first Tetrarchy, governing the western provinces while his son Constantine begins the military career that will overtake the system Constantius served.