NO. Persian kings did not trust their own and always maintained a very strong Indian contigent as their most trusted. The Brahmin Indian cavalry was exclusively made up of Mohiyal Brahmins with Dutta Brahmins as the majority. The Persia extended to present day Irag and Syria. This land was called Persia. The Shias even today take the name of one Rihab Sidh Dutt in their first Namaz. he was the Brahmin who ran away with the head of Hussain to Syria and sacrificed his six sons to bring back the head to Karbala.
These same Brahmins were from the extended family of King Purosottam Dutt also known as Porus. Porus and King Dahir were both Brahmin kings from Bhardwaj Gotra. AND we all know about what happened to Alexander in the battle against Porus. He was comprehensively defeated and his army lost the fighting spirit.
Arrian says Persian satrap. Among five others.
Porushaspa.
Arrian was there. He was a chronicler. Not a historian.
Cheers, Doc