Answer:
Sparta used its navy to attack Athens along the coastline.
Step-by-step explanation:
The Peloponnesian War was a war in ancient Greece between Athens and its allies on the one hand and Sparta and its allies on the other. Historians have usually divided the war into three periods. During the first period, the Archidemic War, Sparta repeatedly invaded the Attic Peninsula, but Athens used its superiority at sea to strike a shore on the Peloponnesian Peninsula, trying to quell unrest among its allies. This period of war ended in 421 BC. with the peace of Nicias. But before long, conflict broke out again on the Peloponnesian Peninsula. In the year 415 BC Athens sent troops to Sicily in hopes of capturing Syracuse. The attack failed miserably and the Athenians lost all the troops they sent in 413 BC. At this juncture, the last phase of the war, commonly known as the Ionian War, began. Sparta, now backed by the Persian Empire, supported the revolution in Athens 'allies in the Aegean Sea and in Ionia, undermining Athens' power and domination of the sea. The destruction of the Athenian navy at the Battle of Ægospotami marked the end of the war, and Athens surrendered a year later.