Videos:

• Crash Course, “The Persians & the Greeks”, https://www.youtube.com/watch?v=Q-mkVSasZIM
• Epimetheus, “Empires of Ancient Persia explained in 10 minutes”https://www.youtube.com/watch?v=BJvxW0xJKxo
• Knowledgia, “Why did the Persian Empire collapse?”, https://youtu.be/FhMLA3BCCIk
• Overly Sarcastic Productions, “History Summarized: Ancient Persia”, https://youtu.be/V4niY5Uq95k
• World History Encyclopedia, “Ancient Persia and the Achaemenid Persian Empire”, https://www.youtube.com/watch?v=2nMn4TnbkdA