I've always been able to make good friends with Harun al-Rashid, only to have him declare war on me whenever somebody throws even the smallest amount of coin his way to do so.
"Attack my friend and long time ally? Why I would never!...Oh 2 gold per turn you say? Well that changes everything!"
"Attack my friend and long time ally? Why I would never!...Oh 2 gold per turn you say? Well that changes everything!"