15 events the sources record for this year, grouped by region.
What happened
West Asia (12)
From Susa he crossed the Pasitigris river into the land of the Uxians and attacked a mountain village at night. Craterus blocked the high ground and took the narrow pass. The mountain tribes were allowed to keep their land on condition of paying tribute each year. (Arrian, Anabasis of Alexander 3.17.1–3.17.6)
Blocked by the wall built by Ariobarzanes, he was guided by a prisoner on a night detour of about 100 stadia and attacked at dawn. Craterus attacked the wall at the sound of trumpets, encircling and routing the Persian army. (Arrian, Anabasis of Alexander 3.18.1–3.18.2)
He hurried to Persepolis, guarded the treasury, and also took the wealth of Pasargadae. Against the advice of Parmenion, he burned the Persian palace (Arrian criticizes this). (Arrian, Anabasis of Alexander 3.18.1–3.18.10)
He marched on Ecbatana after hearing that Darius meant to head for the Caspian Gates from Media. Three days before Ecbatana, he learned from Bistanes that Darius had fled five days earlier with 7,000 talents and infantry and cavalry. (Arrian, Anabasis of Alexander 3.19.1–3.19.5)
He pursued Darius and on the eleventh day reached Rhagai, but Darius had already passed through the Caspian Gates. After resting five days he set out for Parthia, camped before the Caspian Gates, and passed through them the next day. (Arrian, Anabasis of Alexander 3.20.1–3.20.2)
Nobles from Babylon came and reported that Bessus and others had arrested Darius. Alexander made a forced march day and night with mainly cavalry, and picked 500 select infantry to ride on horses. He covered 400 stadia in the night and caught up with the enemy at dawn. (Arrian, Anabasis of Alexander 3.21.1–3.21.10)
He entered Hyrcania, crossed the mountains, and reached Zadrakarta, where Nabarzanes and Phrataphernes, close aides of Darius, surrendered. Greek mercenaries serving Darius, about 1,500, sent envoys offering to surrender unconditionally. (Arrian, Anabasis of Alexander 3.23.1–3.23.6)
He stayed fifteen days in Zadrakarta, held sacrifices and games, then went through Parthia and at Arei Susia restored Satibarzanes to office. On hearing that Bessus had put on the crown and taken the name Artaxerxes, he set out for Bactra. (Arrian, Anabasis of Alexander 3.25.1–3.25.8)
Satibarzanes killed Anaxippos and others and gathered Arians at Artakoana. Hearing this, Alexander stopped the march to Bactra and pushed 600 stadia in two days. When he fled, Alexander punished the rebels and set up a new satrap. (Arrian, Anabasis of Alexander 3.25.1–3.25.5)
Alexander uncovered a plot by Philotas. Philotas was condemned in front of the Macedonians and killed by spears, and letters were sent to the generals of Media, which also led to the execution of Parmenion. (Arrian, Anabasis of Alexander 3.26.1–3.26.4)