Answer;
Sparta attacked Athens by land
The Peloponnesian War began after Sparta attacked Athens by land.
Explanation;
-The Peloponnesian War was fought between the Greek city-states of Athens and Sparta. It lasted from 431 BC to 404 BC. Athens ended up losing the war, bringing an end to the golden age of Ancient Greece.
-After the Persian War, Athens and Sparta had agreed to a Thirty Year Peace. They didn't want to fight each other while they were trying to recover from the Persian War. During this time, Athens became powerful and wealthy and the Athenian empire grew under the leadership of Pericles.
-Sparta and its allies became increasingly jealous and distrustful of Athens. Finally, in 431 BC, when Sparta and Athens ended up on different sides in a conflict over the city of Corinth, Sparta declared war on Athens.
