204 BC

By place

Carthage

• Having lost his alliance with the Numidian chief Masinissa, the Carthaginian general, Hasdrubal Gisco, finds a new ally in the Numidian king Syphax, who marries Sophonisba, Hasdrubal's daughter, who, until his defection to Rome, has been betrothed to Masinissa.
• Roman forces under Publius Cornelius Scipio besiege Utica in Carthaginia. Scipio is unable to stop the combined forces of the Carthaginians under Hasdrubal Gisco and the Numidians under their chief, Syphax, and he is forced to lift his siege of Utica.

  Egypt

• The late Egyptian King Ptolemy IV's clique of favourites, led by Sosibius, Ptolemy's chief minister, keeps Ptolemy's death a secret, fearing retribution from the new king Ptolemy V's mother, Queen Arsinoe III. They arrange for the murder of Arsinoe, and then the five-year-old king is officially elevated to the throne with Sosibius as his guardian. Arsinoe has been popular with the Egyptian population so rioting follows the news of her assassination.

  Roman Republic

• The Battle of Crotona is fought between Hannibal's Carthaginian army, and a Roman force led by Publius Sempronius Tuditanus, with no decisive outcome for either side.

  Seleucid Empire

• Philip V of Macedon and Antiochus III of the Syrian-based Seleucid kingdom realize Egypt's weakness and agree to partition Egypt's Anatolian and Aegean possessions. Antiochus' share is to be southern Syria, Lycia, Cilicia and Cyprus, while Philip is to gain western Anatolia and the Cyclades.