9 events the sources record for this year, grouped by region.
What happened
Central Asia (1)
Alexander crossed the Oxus and divided his army into five to subdue Sogdiana. Spitamenes fled to the Massagetae, gathered 600 cavalry, and raided a Bactrian fortress. (Arrian, Anabasis of Alexander 4.16.1–4.16.7)
West Asia (6)
Hermolaus confessed before the Macedonians and was executed. Accounts differ: Aristobulus and Ptolemy testified that Callisthenes had instigated it, while other records deny this. (Arrian, Anabasis of Alexander 4.14.1–4.14.4)
Craterus pursued the Massagetae and caught them near the desert edge, killing 150 cavalry. Spitamenes was finally defeated and killed. (Arrian, Anabasis of Alexander 4.17.1–4.17.7)
300 men skilled at climbing rocks scaled the steepest place at night using iron pegs and flax ropes and took the rock. Through this, Alexander obtained Roxana, daughter of Oxyartes, and married her. (Arrian, Anabasis of Alexander 4.19.1–4.19.4)
Having finished Sogdiana, Alexander went to the land of the Paraitakai and attacked the rock where Chorienes had fled, about 20 stadia high and about 60 stadia around. (Arrian, Anabasis of Alexander 4.21.1–4.21.10)
Alexander marched into the lands of the Aspasians, Guraians, and Assakenoi with shield-bearers, cavalry, and archers. (Arrian, Anabasis of Alexander 4.23.1–4.23.5)
When Alexander marched on Massaga, the large city of the Assakenoi, the garrison, with 7,000 Indian mercenaries, charged out. They tried to draw him away from the walls, and a battle broke out. (Arrian, Anabasis of Alexander 4.25.1–4.25.7)