Year 321 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Calvinus and Caudinus. The denomination 321 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Seleucus I Nicator was one of the Diadochi. Having previously served as an infantry general under Alexander the Great, he eventually assumed the title of basileus and established the Seleucid Empire over much of the territory in the Near East which Alexander had conquered.
Antigonus I Monophthalmus, son of Philip from Elimeia, was a Macedonian nobleman, general, and satrap under Alexander the Great. During his early life he served under Philip II, and he was a major figure in the Wars of the Diadochi after Alexander's death, declaring himself king in 306 BC and establishing the Antigonid dynasty.
Philip III Arrhidaeus reigned as king of Macedonia from after 11 June 323 BC until his death. He was a son of King Philip II of Macedon by Philinna of Larissa, and thus an elder half-brother of Alexander the Great. Named Arrhidaeus at birth, he assumed the name Philip when he ascended to the throne.
Alexander IV, erroneously called sometimes in modern times Aegus, was the son of Alexander the Great and Princess Roxana of Bactria.
Antipater was a Macedonian general and statesman under kings Philip II of Macedon and Alexander the Great, and father of King Cassander. In 320 BC, he became regent of all of Alexander the Great's Empire.
Perdiccas III was king of the ancient Greek kingdom of Macedonia from 365 BC to 360 BC, succeeding his brother Alexander II.
The Wars of the Diadochi, or Wars of Alexander's Successors, were a series of conflicts fought between Alexander the Great's generals over the rule of his vast empire after his death. They occurred between 322 and 275 BC.
Eumenes of Cardia was a Greek general and satrap. He participated in the Wars of the Diadochi as a supporter of the Macedonian Argead royal house. He died after the Battle of Gabiene in 316 BC.
Craterus or Krateros was an ancient Macedonian general under Alexander the Great and one of the Diadochi.
Attalus, son of Andromenes the Stymphaean, and one of Alexander's officers, was accused with his brothers, Amyntas and Simmias, of having been engaged in the conspiracy of Philotas in 330 BC, but was acquitted, together with his brothers. In 328, Attalus was left with Polyperchon and other officers in Bactria with part of the troops, while the king himself marched against the Sogdians. He accompanied Alexander in his expedition into India, and was employed in several important duties. In Alexander's last illness in 323, Attalus was one of the seven chief officers who passed the night in the temple of Serapis at Babylon, in order to learn from the god whether Alexander should be carried into the temple.
Alcetas, was the brother of Perdiccas and the son of Orontes from Orestis. He is first mentioned as one of Alexander the Great's generals in his Indian expedition.
Arrhidaeus or Arrhidaios, one of Alexander the Great's generals, was entrusted by Ptolemy to bring Alexander's body to Egypt in 323 BC, contrary to the wishes of Perdiccas who wanted the body sent to Macedonia. On the murder of Perdiccas in Egypt in 321 BC, Arrhidaeus and Peithon were appointed temporary commanders in chief, but through the intrigues of the queen Eurydice they were obliged soon afterwards to resign their office at Triparadisus in Northern Syria. On the division of the provinces which was decided by those attending Triparadisus, Arrhidaeus obtained the Hellespontine Phrygia. In 319 BC, after the death of Antipater, Arrhidaeus made an unsuccessful attack upon Cyzicus; and Antigonus gladly seized this pretext to require him to resign his satrapy. Arrhidaeus, however, refused to resign and shut himself up in Cius.
Nicaea was a Greek Macedonian noblewoman and was a daughter of the powerful regent Antipater. Her mother's name is unknown. She was born and raised in Macedonia while her father was governor of Macedonia during the reign of Greek King Alexander the Great.
Philotas was a Macedonian officer in the service of Alexander the Great, who commanded one taxis or division of the phalanx during the advance into Sogdiana and India. It seems probable that he is the same person mentioned by Curtius, as one of those rewarded by the king at Babylon for their distinguished services. There is little doubt also, that he is the same to whom the government of Cilicia was assigned in the distribution of the provinces after the death of Alexander, 323 BC. In 321 BC, he was deprived of his government by Perdiccas and replaced by Philoxenus, but it would seem that this was only in order to employ him elsewhere, as we find him still closely attached to the party of Perdiccas, and after the death of the regent united with Alcetas, Attalus, and their partisans, in the contest against Antigonus. He was taken prisoner, together with Attalus, Docimus, and Polemon, in 320 BC, and shared with them their imprisonment, as well as the daring enterprise by which they for a time recovered their liberty, when they took possession of their prison, overpowering their guards. He again fell into the power of Antigonus, in 316 BC.
Neoptolemus was a Macedonian officer who served under Alexander the Great.
The Partition of Triparadisus was a power-sharing agreement passed at Triparadisus in 321 BC between the generals (Diadochi) of Alexander the Great, in which they named a new regent and arranged the repartition of the satrapies of Alexander's empire among themselves. It followed and modified the Partition of Babylon made in 323 BC upon Alexander's death.
