287 CE
The first Indiction begins. Around this time, the future emperor Constantius defeats and captures a Germanic king, the latter having prepared an ambush against the Romans. Diocletian signs a peace treaty with King Bahram II of Persia, and installs the pro-Roman Arsacid Tiridates III as king over the western portion of Armenia.
Geopolitics & Diplomacy
- Diocletian signs a peace treaty with King Bahram II of Persia, and installs the pro-Roman Arsacid Tiridates III as king over the western portion of Armenia.source
Conflict & Security
- Around this time, the future emperor Constantius defeats and captures a Germanic king, the latter having prepared an ambush against the Romans.source
- On the same day that he is made consul, Maximian launches a campaign against an invasion of Gaul by the Alemanni. After defeating this invasion, he then invades Alemannia itself, entering across the Upper Rhine and returning to Roman territory via the Upper Danube.source
Crime & Justice
- September – The first Indiction begins.source