Athens formed an alliance of Greek cities to oppose Persia after the Persian invasion had been repulsed. The alliance was funded by contributions from the league while Athens provided the naval power financed by this.
When peace was made with Persia, Athens continued to levy the contributions, using its navy to do so by force if necessary. This league thus effectively became an empire of Athens.
Athens built an empire by using the money from the Delian League to rebuild and beautify Athens!!
Persian Empire
Dissatisfaction with Athens's growing empire. :)
Athens turned the league which it led against the Persian Empire into an empire of its own. Using the power of this empire to bully other city-states. The Peloponnesian League led by Sparta called Athens on its attempt to bankrupt its neighbour Megara, a member of their league, an overconfident Athens persisted, resulting in a destructive war which Athens lost, and was stripped of its empire.
Pericles had three goals for Athens. The first was to strengthen democracy. The second was to expand the empire. The third was to beautify Athens.
Persian
Athens turned the league which it led against the Persian Empire into an empire of its own. Using the power of this empire to bully other city-states. The Peloponnesian League led by Sparta called Athens on its attempt to bankrupt its neighbour Megara, a member of their league, an overconfident Athens persisted, resulting in a destructive war which Athens lost, and was stripped of its empire.
To strengthen Athenian democracy, to hold and strengthen he empire, and to glorify Athens
Constantinople
After defeat, Athens was stripped of its empire, and without the revenues they mulcted from it, they were not able to either maintain naval preeminence or afford the expenditures which had supported such extravagances as the beautification of Athens.
Athens and its empire versus the Peloponnesian League led by Sparta.
An amphibious expeditionary force from the Persian Empire sent to punish Athens for adding to trouble within the empire, and the culprit Athens and its junior ally Plataia.