26 events the sources record for this year, grouped by region.
What happened
Central Asia (5)
Parthia and Hyrcania revolt against Darius and side with Phraortes, and the army of his father Hystaspes also defects (Behistun Inscription §35 (Col. II 92-95))
Hystaspes fights the rebels at Vishpauzatish in Parthia and wins (Behistun Inscription §35 (Col. II 95-98 / Col. III 1))
Darius sends a Persian army from Rhagae, and Hystaspes crushes the rebels at Patigrabana in Parthia (Behistun Inscription §36 (Col. III 1-9))
Margiana revolts and makes Frada its leader; Darius sends Dadarshish, satrap of Bactria (Behistun Inscription §38 (Col. III 10-15))
Dadarshish, satrap of Bactria, fights the Margianians and defeats them (Behistun Inscription §38 (Col. III 15-20))
South Asia (1)
The army sent by Vahyazdata fights Vivana, satrap of Arachosia, at the fortress of Kapishakani, but Vivana wins (Behistun Inscription §45 (Col. III 54-63))
West Asia (20)
While Darius is in Babylon, Persia, Susiana, Media, Assyria, Egypt, Parthia, Margiana, Sattagydia and the Scythians revolt (Behistun Inscription §21 (Col. II 5-8))
Martiya (son of Cicikhrish) rebels in the Persian city of Kugananaka and in Susiana calls himself "Ummanish, king of Susiana" (Behistun Inscription §22 (Col. II 8-11))
The Susianians, fearing Darius, seize their leader Martiya and kill him (Behistun Inscription §23 (Col. II 11-13))
Hydarnes, sent by Darius, defeats the Median rebels in battle at the Median city of Marush (Behistun Inscription §25 (Col. II 18-26))
The Armenian Dadarshish first defeats the rebels at Zuzza in Armenia (Behistun Inscription §26 (Col. II 29-38))
The rebels regroup and fight at the fortress of Tigra in Armenia, but Dadarshish wins (Behistun Inscription §27 (Col. II 38-42))
For the third time the rebels gather and fight at the fortress of Uyama and are defeated; Dadarshish waits in Armenia until Darius comes to Media (Behistun Inscription §28 (Col. II 43-48))
The Persian Vaumisa goes to Armenia and first defeats the rebels at Izzitu in Assyria (Behistun Inscription §29 (Col. II 48-56))
The rebels gather a second time and fight at Autiyara in Armenia, but Vaumisa wins and awaits Darius (Behistun Inscription §30 (Col. II 57-64))
Darius leaves Babylon, reaches Media, and defeats Phraortes' army at Kundurush (Behistun Inscription §31 (Col. II 64-70))