|Centuries:||2nd century – 3rd century – 4th century|
|Decades:||210s 220s 230s – 240s – 250s 260s 270s|
|Years:||238 239 240 – 241 – 242 243 244|
- Winter – Emperor Gordian III reaches Antioch. He gets his army ready to fight against the Persians.
- Timesitheus becomes Praetorian Prefect
- Shapur I succeeds his father Ardashir I as king of Persia.
- The ancient city of Bagram (Afghanistan) is abandoned.
- Shapur I adds parts of the Kushan Empire.