Peace,
Omar Ibn Al Khatab Khalifat Al-Muslemin wrote an ultimatim to Yazdgird III, the Shah of Iran in 635.
I thought you might find this interesting to read, it's a true historical document.
http://216.239.39.104/search?q=cache:Q2 ... n&ie=UTF-8
You can see how ignorant Umar was about the advanced and ancient Perisan culture. Itseems he just gave an ultimatum regardless of who the Persians were. He just wanted to conquer more land to spread the new faith of Islam.
What are you're comments on this letter?