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Peloponnesian League

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The Peloponnesian League was a large group of ancient Greek city-states.

Peloponnesian League 506 BC
Peloponnesian League 506 BC

Sparta was the main leader of this alliance. The group lasted for a very long time, from about 550 BC to 366 BC. It was famous for being one of the two main rivals in the Peloponnesian War. That war lasted from 431 BC to 404 BC. The League fought against the Delian League, which was led by Athens. While people call it a league, it was actually a system of many separate deals.

Map Peloponnesian War 431 BC-en
Map Peloponnesian War 431 BC-en

Sparta worked with other cities through special treaties. Instead of one big contract, Sparta made a separate deal with every single member. Each city swore a solemn oath to the Spartans. They promised to have the same friends and the same enemies as Sparta. They also promised to follow the Spartans wherever they led. These deals were meant to be permanent. Members were even forbidden from leaving the group. The treaties were also meant for defense. Sparta had to help an ally if they were attacked. In return, the allies had to help Sparta if it was under attack.

In the early days, Sparta grew by conquering nearby lands like Laconia and Messenia. This was a hard time for the people living there. After a failed battle at Tegea, Sparta changed how it acted. They stopped trying to conquer land through force alone. Instead, they used a clever diplomatic plan. They gathered the bones of mythical heroes to show they were important. This helped them win over neighbors like Tegea. Once Tegea signed a treaty, the League began to grow. Other cities like Corinth and Mantinea soon joined too.

Peloponnesian League 506 BC
Peloponnesian League 506 BC

Rules for the League changed a lot around 506 BC. Before this, the Spartan king Cleomenes I tried to take over Athens. The plan failed because some allies, like the Corinthians, did not want to help. Because of this, Sparta had to give the allies more power. They created a group called a congress. Now, the allies could vote on matters of war and peace. In this congress, every city's vote was worth the same amount. This gave some cities, like Corinth, a lot of influence. Even if an ally voted against a plan, they still had to follow the final result.

Sparta held the most power in the League. A Spartan king or leader usually commanded the army during wars. Sparta also used friendships to keep allies close. Leaders from other cities would send their sons to study in Sparta. This helped create strong ties between the cities. In 378 BC, the League was organized into ten military districts. This helped manage the large number of soldiers. Each district could provide between 3,000 and 4,000 hoplites. This meant the League could have a massive army of at least 30,000 men.

Map Peloponnesian War 431 BC-en
Map Peloponnesian War 431 BC-en
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File:Map Peloponnesian War 431 BC-en.svg
Map Peloponnesian War 431 BC-en.svg
File:Peloponnesian League 506 BC.png
Peloponnesian League 506 BC.png
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