Answer:
True
Step-by-step explanation:
There were a series of war conflicts that confronted the Persian empire of the Achaemenid dynasty against the city-states of the Greek world throughout the first half of the fifth century B.C. The Delian league was a military alliance emerged as a result of these conflicts. They feared that a third Persian invasion would occur in the future, so they decided to establish a new and lasting military alliance to be prepared