222 BC

Millennium:	1st millennium BC
Centuries:	4th century BC – 3rd century BC – 2nd century BC
Decades:	250s BC  240s BC  230s BC  – 220s BC –  210s BC  200s BC  190s BC
Years:	225 BC 224 BC 223 BC – 222 BC – 221 BC 220 BC 219 BC

Greece

• Cleomenes III is defeated and the Spartan army annihilated by the Achaean League and the Macedonians in the Battle of Sellasia.
• Ptolemy IV succeeds his father Ptolemy III as king of Egypt.

Rome

• Marcus Claudius Marcellus leads the Romans to victory in the Battle of Clastidium, conquering the area later known as Cisalpine Gaul.
• The Romans capture Milan.

Asia

• State of Qin conquers the state of Yan and defeats the last defensive forces of the state of Zhao in China .

Deaths

• Ptolemy III Euergeter I, king of Egypt
• Ctesibius, mathematician