AWA152 - Were Philip and Alexander invincible?

The Macedonian armies of Phillip and Alexander were almost invincible, but afterwards "Macedonian" style armies seem to be more hit and miss (vs. Romans, Indians, Parthians, Celts etc.). Was this because Philip and Alexander's troops were uniquely competent, or was it that the commanders after Alexander just couldn't measure up?

Murray answers this question sent in from patron of the podcast Juan.

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