The Cypress of Kashmar was a sacred tree of the Zoroastrians. Apparently, according to the Shahnameh and other sources, it was planted by Zoroaster (or his patron) at the fire temple of Kashmar, and a millennium and a half later it was cut down amid much outcry by Ja'far al-Mutawakkil to be used...

I'm trying to find out more about the impact of World War I on American soldiers.