Seleucus II Callinicus
Seleucus appointed his brother Antiochus Hierax as viceroy of the Seleucid Empire so that he could have Antiochus Hierax rule Syria for him while he left to fight Ptolemy. Ptolemy won most of the battles but Seleucus won enough of them that in 241 B.C.E. they agreed to a treaty which said that Ptolemy ruled all the lands he conquered but that Seleucus would stay ruler of the Seleucid Empire.