阴火鸡年 (female Fire-Rooster) 404 or 23 or −749 — to — 阳土狗年 (male Earth-Dog) 405 or 24 or −748
Year 278 (CCLXXVIII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Probus and Lupus (or, less frequently, year 1031 Ab urbe condita). The denomination 278 for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
Events
By place
Roman Empire
Emperor Probus defeats the Alamanni, advancing through the Neckar Valley. He expels the Franks from Gaul, and reorganizes the Roman defenses on the Rhine.
Probus resettles the Germanic tribes in the devastated provinces of the Roman Empire. He adopts the titles of Gothicus Maximus and Germanicus Maximus.