The world in 391 BC — what happened that year

8 events the sources record for this year, grouped by region.

What happened

In an ambush by Struthas, Tibrones and Thersander and others fall. (Xenophon, Hellenica 4.8.19)

Drawn by wine and fruit, the Gauls cross the Alps and occupy land near Etruria (Livy, History of Rome (Ab Urbe Condita) 5.33) tradition
The Gauls who crossed the Alps defeat the Etruscan army near the Ticinus (Livy, History of Rome (Ab Urbe Condita) 5.34) tradition
In anger Camillus resolves to leave the city and go into exile (Plutarch's Parallel Lives Plut. Camillus 12.2)
The Gauls besiege the Tuscan city of Clusium (Plutarch's Parallel Lives Plut. Camillus 17.1)
Agesilaus invades Argos, plunders its entire territory, and marches on to Corinth. (Xenophon, Hellenica 4.4.19)
Hearing a Corinthian exile, Agesilaus aims at Piraeum, the place where the cattle were kept, invades Corinthian territory again, and holds the Isthmian games in honor of Poseidon. (Xenophon, Hellenica 4.5.1–4.5.2)
When Agesilaus takes the heights of Piraeum, the inhabitants flee to Heraeon, and captives pour out. (Xenophon, Hellenica 4.5.5–4.5.6)