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297 BC

The expedition under Adelphius, after an establishment of a small trade hub in Allobroges tribe area, reached Vesontio, the capital of Sequani tribe, where they exchanged gifts with the local king Cosgrach, establishing an alliance and an official trade hub leaving 50 people behind. After Vesontio, they went up to explore until Luxiol and then they returned. Then they went all the way up north to the end of Saone river, where they established two trade hubs. After that they returned back home.

• A new glorious Temple of Athena is built in Massalia with funds of the common treasury.
• A new academy is built in Emporion by Dynatoi company.
• A new academy is built in Nikaia by Palaioi company.
• Both companies of Massaliot League invited scholars to their academies.
• Cleonymus of Sparta with four hundred Spartan mercenaries is invited to re-organise the military and lead an invasion against Vocontii tribe.

By place (original timeline)

Roman Republic

•Fabius Maximus Rullianus becomes consul for the fourth time. He defeats the Samnites in a battle near Tifernum.

Greece

• Following Cassander's death from illness, Philip IV, Cassander's eldest son, succeeds his father as King of Macedon, but soon after coming to the throne suffers from a wasting disease and dies. Antipater, the next son, rules jointly with his brother Alexander V.
• Demetrius Poliorcetes returns to Greece with the aim of becoming master of Macedonia. While Demetrius is in Greece, Lysimachus seizes his possessions in Asia Minor.
• Ptolemy decides to support Pyrrhus of Epirus and restores him to his kingdom. At first Pyrrhus reigns with a kinsman, Neoptolemus II of Epirus (who is a son of Cleopatra of Macedonia and a nephew of Alexander the Great), but soon he has him assassinated.