The video below “Misunderstood Moments in History: Why the Persians Failed to Conquer Greece” has been produced by the Invicta outlet in Youtube. Readers are encouraged to also consult the following resources:
Achaemenid Military History
The Achaemenid Army
Map of the Achaemenid Empire
Interview of Spanish Military Journal, Historia Rei Militaris, with Kaveh Farrokh (February 17, 2019)
History Channel – Engineering an Empire: The Persians
The above video provides a balanced expostulation of the Achaemenid-Greek wars (Source: Invicta in Youtube).