Of Coins of Greek and Scythic Kings of Bactria and India, Brit.
In Asia Alexander learnt that Bessus had taken the diadem as Darius' successor in Bactria, but so soon as he marched against him Aria rose in his rear, and Alexander had to return in all haste to bring the revolt under.
Nor did he, when this was accomplished, again strike directly at Bactria, but made a wide turning movement through Seistan over Kandahar into the Kabul valley.
In the spring of 328 Alexander crossed the Hindu Kush into Bactria and followed the retreat of Bessus across the Oxus and into Sogdiana (Bokhara).
Till the spring of 327 Alexander was moving to and fro in Bactria and Sogdiana, beating down the recurrent rebellions and planting Greek cities.