Athens and its allies and Sparta and its allies.
Athenians main rivals where from Sparta. They fought in the Peloponnesian wars.
In ancient Greece, notable city-states that fought against each other included Athens and Sparta, primarily during the Peloponnesian War (431-404 BCE). Other rival city-states included Corinth and Thebes, which also engaged in various conflicts over territory and influence. These city-states often formed shifting alliances, leading to a complex web of warfare and diplomacy throughout Greek history.
Rome fought Carthage . Why - to eliminate a rival for political and commercial control of the wester Mediterranean .
Genghis Khan first united the rival Mongol tribes after his wife had been kidnapped by another rival Mongol tribe. After that, the Mongols fought and conquered the rival non-Mongolian powers in the steppes regions.
Isaac Newton had a rival named Halley. They both fought about who made calculus first. (Isaac Newton won the fight)
Sparta and Athens vied for supremacy .
Sparta and Athens joined 20-odd other Greek city-states to oppose Persia. After that war,the Peloponnesian League led by Sparta fought the Peloponnesian War against the Athenian empire.
Persian War: The Greek cities of Asia Minor provided a third of the Persian navy for the 480 invasion of southern Greece. The Greek city states of central Greece provided a substantial part of the Persian army which fought the southern Greek armies. Peloponnesian War: Athens and the cities in its empire fought the mainly Peloponnesian cities led by Sparta.
Athenians main rivals where from Sparta. They fought in the Peloponnesian wars.
peloponnesian league
Many Greeks outside of Athens resented Athenian domination. Before long, the Greek world split into rival camps. To counter the Delian league, Sparta and other enemies of Athens formed the Peloponnesian League, while Athens supported the among its allies That is why the Peloponnesian War took place.
Athens used the power of its empire to intervene in the affairs of the southern Greek cities in the Peloponnesian Peninsula and their colonies. These incursions were principally in Corcyra and Potidaea and finally its trade rival Megara which Athens set out to bankrupt. The Peloponnesian League, led by Sparta, of which Megara was a member, demanded that Athens cease this; Athens refused and war broke out.
The Spartans feared no one. They led a confederation of city-states (the Peloponnesian League) which defeated the over-confident rival Athenian empire in the Peloponnesian War.
The city-states of Athens and Sparta as well as their allies were involved in the war that started at 431 and ended at 404 BCE. The Spartans and their allies were the winners of the war that later was named "the Peloponnesian war"
Corinth, Thebes, Sparta.
they fought there using Korea for a battle ground
Knights fought whoever was a threat to their lord, whether it be rival knights or raging peasants.