321 BC

Millennium:	1st millennium BC
Centuries:	5th century BC – 4th century BC – 3rd century BC
Decades:	350s BC  340s BC  330s BC  – 320s BC –  310s BC  300s BC  290s BC
Years:	324 BC 323 BC 322 BC – 321 BC – 320 BC 319 BC 318 BC

321 BC by topic

Politics

State leaders – Sovereign states

Birth and death categories

Births – Deaths

Establishments and disestablishments categories

Establishments – Disestablishments

321 BC in other calendars

Gregorian calendar	321 BC CCCXX BC
Ab urbe condita	433
Ancient Egypt era	XXXIII dynasty, 3
- Pharaoh	Ptolemy I Soter, 3
Ancient Greek era	114th Olympiad, year 4
Assyrian calendar	4430
Balinese saka calendar	N/A
Bengali calendar	−913
Berber calendar	630
Buddhist calendar	224
Burmese calendar	−958
Byzantine calendar	5188–5189
Chinese calendar	己亥年 (Earth Pig) 2376 or 2316     — to — 庚子年 (Metal Rat) 2377 or 2317
Coptic calendar	−604 – −603
Discordian calendar	846
Ethiopian calendar	−328 – −327
Hebrew calendar	3440–3441
Hindu calendars
- Vikram Samvat	−264 – −263
- Shaka Samvat	N/A
- Kali Yuga	2780–2781
Holocene calendar	9680
Iranian calendar	942 BP – 941 BP
Islamic calendar	971 BH – 970 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2013
Minguo calendar	2232 before ROC 民前2232年
Nanakshahi calendar	−1788
Thai solar calendar	222–223
Tibetan calendar	阴土猪年 (female Earth-Pig) −194 or −575 or −1347     — to — 阳金鼠年 (male Iron-Rat) −193 or −574 or −1346

Year 321 BC was a year of the pre-Julian Roman calendar.

Events

By place

Macedonian Empire

• Antipater makes Antigonus commander in chief of his army in Asia Minor. He sends him with Craterus to fight against Eumenes, the satrap of Cappadocia and a supporter of Perdiccas.
• Perdiccas marches against Ptolemy. When he fails to cross the Nile he is murdered by mutinous officers. Ptolemy is in power in Egypt and Seleucus in power in Babylon.
• The main generals of the late Alexander the Great agree to the Partition of Triparadisus.
• Ptolemy strengthens his position by marrying Eurydice, the third daughter of Antipater.
• Antigonus and Craterus defeat Eumenes in battle. Eumenes escapes.

Roman Republic

• Successes by Rome's armies force the Samnites to ask for peace. The terms are harsh so peace does not happen.
• Two Roman consuls, Spurius Postumius Albinus and Titus Veturius Calvinus, lead a force into Samnium. They are trapped in a mountain pass known as the Caudine Forks. They make a five-year treaty with the Samnites.

India

• Chandragupta Maurya, founder of the Mauryan empire, makes himself king of Magadha.

Deaths

• Craterus, Macedonian general (b. c. 370 BC)
• Perdiccas, Macedonian general and regent after the death of Alexander the Great (b. c. 365 BC)
• Zhou Xian Wang, King of the Zhou Dynasty of China