3rd century
What happened around the world
Middle East
- 224 Rise of the Sasanian Empire — Ardashir topples Parthia and gives Rome a new rival
- 260 Battle of Edessa: a Roman emperor taken captive — For the first time, a Roman emperor is taken captive
- 272 Fall of Zenobia's Palmyrene Empire — A desert queen defied Rome and seized half its East
Africa
- 249–262 Plague of Cyprian — A mystery disease ravages Rome through a decade of crisis
Asia
- 220 Fall of the Han and the Three Kingdoms — Cao Pi ends the Han and China splits into three
- 239 Queen Himiko's embassy to China — The first ruler of Japan known to us by name
Americas
- c. 250 Rise of the Classic Maya cities — Pyramid city-states rise in the Petén jungle
- c. 280 Xitle eruption buries Cuicuilco — Lava buries an early city and clears the way for Teotihuacan
Oceania
- c. 232 Hatepe eruption of Taupō — New Zealand's biggest blast in 20,000 years, and no one saw it
Who ruled
- China: dynasties
- Han 202 BC – 220, Three Kingdoms 220 – 280, Jin 266 – 420
- Rome and Byzantium
- Severans 193 – 235, Crisis of the 3rd century 235 – 284, Constantine the Great 284 – 395
Largest states
- Roman Empire
- Xianbei
- Sasanian Empire
- Han Dynasty
- Western Jin
- Parthian Empire
- Cao Wei
- Kushan Empire
- Indo-Scythians
- Huns
- Eastern Wu
- Cao Cao
- Eastern Kushans
- Palmyrene Empire
- Later Zhou
- Satavahana Dynasty
- Shu Han
- Western Satraps
- Indo-Sasanian Empire
- Gallic Empire
- Protectorate of the Western Regions
- Western Kushans
- Vakataka Kingdom
- Gothia
- Kingdom of Kush
- Tuyuhun
- Kingdom of Armenia
- Goguryeo
- Kingdom of Axum
- Mayan City-States
- Himyarite Kingdom
- Late Pallava Empire