The emperor Constantius Chlorus campaigned successfully against several Germanic peoples during the internecine civil wars that brought him to sole power over the Roman Empire. Among them were the Frisii and Chamavi, who were described in the "Panegyrici Latini" (Manuscript VIII) as being forced to resettle within Roman territory as "laeti" (i.e., Roman-era serfs) in c. 296. This is the last reference to the ancient Frisii in the historical record. However, they appear once more, now in the archaeological record. The discovery of a type of earthenware unique to 4th century Frisia known as "terp Tritzum" shows that an unknown number of them were resettled in Flanders and Kent, likely as "laeti" under the aforementioned Roman coercion.