The Spartans' main rival was Athens.
The rivalry between Sparta and Athens, known as the Peloponnesian War, lasted for over two decades (431-404 BC) and significantly shaped the history of ancient Greece.
The two city-states had vastly different political systems, social structures, and military strategies. Sparta was an oligarchy with a strong military focus, while Athens was a democracy with a vibrant culture and powerful navy.
Their rivalry stemmed from competing interests in controlling the Greek world. Sparta, with its land-based military, sought to dominate the Peloponnese region, while Athens, with its powerful navy, aimed for control of the Aegean Sea and its surrounding islands.
The Peloponnesian War saw numerous battles and sieges, most notably the Battle of Marathon, the Battle of Salamis, and the Siege of Syracuse.
The war ultimately ended with the defeat of Athens, which marked the decline of Athenian power and the rise of Spartan dominance in Greece.
Although the rivalry between Sparta and Athens was fierce, they also collaborated in times of need, such as during the Persian Wars.
The legacy of their rivalry continues to fascinate historians and scholars today, highlighting the complexities and consequences of power struggles in ancient Greece.