Septimius Severus wins civil war at the battle of Lugdunum. This allowed the Romans to be united and function much better as a whole.
Barbarians attack the Empire, leading to stressful times for the Romans.
The Roman Road system s completed allowing easier transportation around the great Empire
Septimius Severus expands further South into African Roma,giving Rome stronger control over Africa.
Septimius Severus begins a campaign in Britain hoping for a way to achieve military glory.
Caracalla grants citizenship to all free people in the Roman Empire in order to tax all of them. This served as a great gain of money to the Empire, and increased the number of Roman citizens greatly.
Caracalla kills King Abgar of Edessa and declares Edessa a Roman colony.
Caracalla massacres Alexandria's inhabitants
Baths of Caracalla are built, this is the largest bath structure in Rome. Bathing is important in Rome as the bathes served as a main social area as well.
Caracalla campaigns into Parthia, where he is murdered in Edessa by his own soldiers.
Macrinus is forced to make peace in Parthia under unfavorable terms.
The Sassanids invade Mesopitamia
Alexander defeats the Sassanids in mesopitamia