Alexander conquered the whole Persian empire with the help of many capable generals. The most experienced of them was Parmenion. Yet the king of Macedon decided to reject a piece of well-meant advice coming from this man more often than to accept it and ended up ordering his murder.
Alexander took hold of many precious possessions of the Persian king – a huge treasure, his mother, wife and children. It was in this desperate situation when Darius sent envoys to Alexander carrying a letter.