they formed the delian league because they had to join toegether to defeat the Persians
Yes , and Athens exploited her position to the detriment of the other Greek city-states which ultimately led to the Peloponnesian Wars .
It is true that about 180 Greek city-states formed the Delian League to protect themselves from Persian rule. Not sure why 'why' would be 'true of false'.
Delos was a Greek city-state where the treasury of the anti-Persian Delian League was held for safe keeping in its temple of Apollo.
It was primarily the city - state of Athens that formed the Delian League which was a loose coalition of other Greek city - states (Polis) to thwart Persian expansionist policies . Below at the related link is a list of Delian members .
they formed the delian league because they had to join toegether to defeat the Persians
Delian League
Delian League
Athens
Athens appears to be the city-state that controls the Greek peninsula due to its powerful navy, strong economy, and leadership role in the Delian League.
Athens.
The Delian League
Pericles led the coalition of city-states known as the Delian League .