John D Clare says:
"Alexander Rules His Empire
After his escape from the Gedrosian (Makran) desert, Alexander and the remnants of his army recovered at Susa (324bc).
The events of the year which followed are important for historians for it was in this time that Alexander stopped being a general (336-324bc) and started being the ruler of an empire (324-323bc).
1. Purge of the Satraps
As he had conquered each satrapy in the years up to 324bc, Alexander had taken control of the treasury and the army, and often left a Macedonian garrison in place but, generally, he had been prepared to
re-appoint Persian rulers who surrendered to him (e.g. Mazaeus, Atropates, Abulites, Tiridates, Oxyarchus,
Porus). This may have been to encourage other rulers to come over to his side without fight, but it probably was also connected to the fact that he was continually marching and fighting and did not have time to organise an empire.
Returning to Susa, Alexander found that these arrangements had not worked successfully. Believing that Alexander would not return,
Arrian says, they had committed offences relating to ‘temples, graves and the subjects themselves’. The word he uses for ‘offences’ also means ‘playing out of tune’, so how much the satraps had been indulging in criminal activity, and how much it was simply that Alexander now wished to place his own stamp upon the government of the empire, we will never know.
About a dozen men (including Abulites and his son Ozathres) were executed, ‘in order to inspire others who might be left as viceroys, governors, or prefects of provinces with the fear of suffering equal penalties with them if they swerved from the path of duty; this was one of the chief means by which Alexander kept in subordination the nations which he had conquered in war...’ (Arrian 6.27).
This is significant because, in their places – although he did keep some Persian satraps, such as the brilliant Atropates – Alexander generally appointed Macedonians. At the time of Alexander’s death, 15 of the 24 satraps and 21 of the 24 garrison commanders were Macedonian; Alexander’s empire was overwhelmingly a ‘Macedonian Empire’.
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Cheers, Doc