The world in 222 BC — what happened that year

15 events the sources record for this year, grouped by region.

What happened

Wang Ben attacked Liaodong of Yan, captured King Xi of Yan, returned and attacked Dai, capturing the King of Dai, Jia. (Records of the Grand Historian (Shiji), Annals 史記卷006 秦始皇本紀)

Passing through Libya he reaches Alexandria and meets Ptolemy (Plutarch's Parallel Lives Plut. Agis&Cleomenes 32)
Cleomenes asks the Egyptian court for help (Polybius, Histories 5.35)

Antigonus's army confronts and fights Cleomenes on the heights of Sellasia (Plutarch's Parallel Lives Plut. Philopoemen 6)
He is defeated by Antigonus at Sellasia (Plutarch's Parallel Lives Plut. Agis&Cleomenes 27)
Antigonus enters Sparta without resistance and restores its laws and institutions (Plutarch's Parallel Lives Plut. Agis&Cleomenes 30)
Marcellus spears the enemy chief and throws him from his horse (Plutarch's Parallel Lives Plut. Marcellus 7.2)
The Senate decrees a triumph for Marcellus alone, and the procession was splendid (Plutarch's Parallel Lives Plut. Marcellus 8.1)
Marcellus and others attack the Insubres and take Mediolanum, ending the Gallic war (Polybius, Histories 2.34)
Antigonus winters at Argos and in spring Cleomenes invades the Argolid (Polybius, Histories 2.64)
In summer Antigonus marches into Laconia and Cleomenes camps at Sellasia (Polybius, Histories 2.65)
The Battle of Sellasia begins — the Illyrians attack first (Polybius, Histories 2.67)
Philopoemen distinguishes himself in the cavalry fight and Cleomenes is defeated (Polybius, Histories 2.69)

Places where the world territory data shows a change of borders in this year.