We call it the Peloponnesian War today because it was between the Athenian Empire and the Peloponnesian League, of which Sparta was a member and leader. At the time, they referred to it the war between Sparta and its allies and Athens and its allies.
The Athenian empire was stronger at sea, the alliance led by Sparta was stronger on land.
Most of the Peloponnesian city-states.
The Peloponnesian League, led by Sparta, defeated the Athenian league/empire.
Sparta .
Sparta and its allies.
swords and spears
Alcibiades.
During the Peloponnesian war.
Notably , the main leaders during the Peloponnesian Wars was Pericles leading Athens and Archidamus II of Sparta ~ See related link below .
The advantage that Athens had during the Peloponnesian wars was that they had a bigger army. They also had a larger Navy.
Athens was not in control of Sparta before, during or after the war. The only facet of its military that was stronger than Sparta's was the Athenian navy.
No, its opponent Athens did, brought on be its people being cooped up in Athens under siege by the Peloponnesian League led by Sparta.