Persia tried to keep peace and prosperity within its empire (includung the Greek cities of Asia Minor) and stop external Greek cities from creating trouble within the empire. This failed and the Greeks went back to fighting each other, including the 27-year Peloponnesian War between the Athenian empire and the Peloponnesian League led by Sparta, which devastated the Greek world. Persia had to intervene to try to end it and stop the spillover into its empire.
Presumably the moral lesson is if others want to fight and damage themselves, leave them to it and keep your own house protected and in order.
The moral lesson of the story "The War" depends on the specific story being referenced, as there are many stories with this title. However, a common moral lesson in stories about war is the devastating impact of conflict on individuals, families, and communities, highlighting the importance of peace, empathy, and understanding.
The moral is not to have war because it is going to backfire.
The moral lesson of it is not to be envy..
Moral lesson in karaniwang tao
moral lesson of dahong palay
moral lesson in mill on the floss
moral lesson in mill on the floss
Elephant and Friends moral lesson
moral lesson of hungry wolf
moral lesson of the commedy of errors
moral lesson of ichabod crane
The lesson in a story is called the moral.