Ptolemy XVIII (575 - 23 January 635) was Diadochian Emperor from 618 to 635. A very prominent general in his youth, Ptolemy fought with success against the Persican Empire. Once he became Emperor, he brought the war with Persica to a victorious conclusion: the Empire's eastern border was vastly expanded and for the first time in nearly two centuries the Iberians were no longer obliged to pay the Persicans thousands of pounds of gold annually to maintain peace.