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The 340s BC

71 sourced entries across 10 years, inside the 4th century BC. Each year below opens its own page; the lines under it are that year’s highest-ranked entries.

349 BCE3 entries

  • After recovering from illness, Philip II of Macedon turns his attention to the remaining Athenian controlled cities in Macedonia and to the city of Olynthus, in particular. The Athenians organize to send help.
  • Sidon is besieged by Persian forces. The Persian Empire reasserted its dominance over Egypt after Nectanebo II was forced to flee following the Persian military campaign under Artaxerxes III. The native Egyptian rule briefly came to an end, and the Persians regained control. This was just a precursor to the later events that would lead to Alexander the Great's conquest of Egypt in the early 4th century BCE, ultimately ending Persian rule and ushering in the Hellenistic period.

348 BCE6 entries

  • The city of Eretria on the island of Euboea successfully rebels against the rule of Athens and Euboea is declared independent. The Athenian statesman and general, Phocion's tactical skills save an Athenian force sent to fight the supporters of Philip II on Euboea.
  • Aristotle leaves Athens and Plato's Academy, after which he resided in Assus in northwestern Anatolia.
  • The Athenian help to its cities in Macedonia is diverted by a revolt in Euboea which Philip II of Macedon has fomented. He conquers the city of Olynthus in the Chalcidice and he annexes Chalcidice to Macedonia.

347 BCE8 entries

  • An Athenian delegation, comprising Demosthenes, Aeschines and Philocrates, is officially sent to Pella to negotiate a peace treaty with Philip II. During the negotiations, Aeschines seeks to reconcile the Athenians to Macedonia's expansion into Greece. Demosthenes became unhappy with the result.
  • Aristotle leaves Athens due to the anti-Macedonian feeling that arises in Athens after Philip II of Macedon has sacked the Greek city-state of Olynthus in 348 BC. With him goes another Academy member of note, Xenocrates of Chalcedon. They establish a new academy on the Asia Minor side of the Aegean Sea at the newly built town of Assus.
  • Plato dies and his nephew Speusippus is named as head of the Academy.

346 BCE5 entries

  • The Peace of Philocrates is signed between Macedonia and Athens. The document agrees to a return to the status quo, but Philip II of Macedon keeps the right to punish the Phocians for starting the Sacred War.
  • Following the conclusion of the Peace of Philocrates, Philip II's army moves through the pass of Thermopylae and subdues Phocis. Athens makes no move to support the Phocians.
  • The Athenian politicians, Demosthenes and Timarchus, prepare to prosecute Aeschines for treason after he has sought to reconcile the Athenians to Macedonia's expansion into Greece. Eubulus loses his influence on Athenian affairs.

345 BCE5 entries

  • The Nanda Empire is founded in Magadha.
  • Supported by Thebes and Thessaly, Macedonia takes over Phocis' votes in the Amphictyonic League, a Greek religious organisation formed to support the greater temples of Apollo and Demeter. Despite some reluctance on the part of the Athenian leaders, Athens finally accepts Philip II's entry into the Council of the League. The Athenian statesman Demosthenes is among those who recommend this stance in his oration On the Peace.
  • Carthaginians ravage and blockade Entella.

344 BCE7 entries

  • The aristocracy of Syracuse appeal to their mother city of Corinth against their tyrant Dionysius II. The Corinthian general Timoleon is chosen to lead a liberation force to Sicily. Landing at Tauromenium (Taormina) on March 21st, Timoleon faces two armies, one under Dionysius and the other under Hicetas (tyrant of nearby Leontini), who has also called in Carthaginian forces. By shrewd tactics Timoleon defeats his enemies and occupies Syracuse.
  • The king of Caria, Idrieus, dies, leaving the Persian satrapy, by his will, to his sister Ada, to whom he was married.
  • The Greek philosopher and scientist, Aristotle, travels from Assus to Lesbos to study natural history, especially marine biology.

343 BCE10 entries

  • King Philip II of Macedon again marches against Cersobleptes, King of Thrace, defeats him in several battles, and reduces him to the condition of being a tributary.
  • The native Italian tribes, the Lucanians and Bruttians, press down upon the Greek colonies of Magna Graecia, including Tarentum. Responding to calls for help from these former Greek colonies, King Archidamus III of Sparta sets sail with a band of mercenaries for Italy.
  • First Samnite War began when Rome fought the confederated Samnites over disputed territory in the Middle Liris Valley.

342 BCE7 entries

  • The Greek philosopher, Aristotle, is invited by Philip II to his capital at Pella to tutor his son, Alexander. As the leading intellectual figure in Greece, Aristotle is commissioned to prepare Alexander for his future role as a military leader. (or 343 BC)
  • Philip begins a series of campaigns in Thrace with the aim of annexing it to be a province of Macedonia. When the Macedonian army approaches Thracian Chersonese (the Gallipoli Peninsula), an Athenian general named Diopeithes ravages this district of Thrace, thus inciting Philip's rage for operating too near one of his towns in the Chersonese. Philip demands his recall. In response, the Athenian Assembly is convened. Demosthenes convinces the Athenians not to recall Diopeithes.
  • The Battle of Mount Gaurus is fought between the Romans and the Samnites. The battle is a success for the Romans, who, it is said, are led by Marcus Valerius Corvus. Fought at the foot of Mount Gaurus, near Cumae, it is the most notable engagement of the First Samnite War.

341 BCE5 entries

  • The First Samnite War ends with Rome triumphant and the Samnites willing to make peace.
  • Demosthenes delivers his Third Philippic. In it, he demands resolute action against Philip II. Demosthenes now dominates Athenian politics and is able to considerably weaken the pro-Macedonian faction led by Aeschines. As a result, Demosthenes becomes controller of the Athenian navy.
  • A grand alliance is organised by Demosthenes against Philip II, which includes Byzantium and former enemies of Athens, such as Thebes. These developments worry Philip and increase his anger towards Demosthenes. The Athenian Assembly, however, lays aside Philip's grievances against Demosthenes' conduct and denounces the Peace of Philocrates which has been signed by both sides in 346 BC, an action equivalent to an official declaration of war by Athens against Macedonia.

340 BCE15 entries

  • Pixodarus, the youngest of the three sons of King Hecatomnus of Caria, gains possession of the satrapy of Caria by expelling his sister Ada, the widow and successor of her brother Idrieus.
  • The Roman-Samnite army under consuls Publius Decius Mus and Titus Manlius Torquatus attack and defeat the Latins and Campanians near Mount Vesuvius in the Battle of Vesuvius.
  • Hicetas, the tyrant of Leontini, again persuades Carthage to send a large army to Sicily, which lands at Lilybaeum. Timoleon of Syracuse meets this large Carthaginian army in the Battle of the Crimissus in the west of Sicily and achieves a brilliant victory against superior odds. Despite this victory, the Carthaginians continue to occupy the western half of Sicily, with a treaty being concluded that confines the Carthaginians to the area west of the Halycus (Platani) River.