With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sparta was the principal enemy of Athens, between 431 and 404 BC.
text_B: Sparta -LRB- Doric Greek  : Σπαρτα , Sparta Attic Greek  : Σπαρτη , Sparte -RRB- was a prominent city-state in ancient Greece .. Doric Greek. Doric Greek. Attic Greek. Attic Greek. city-state. city-state. ancient Greece. ancient Greece. In antiquity the city-state was known as Lacedaemon -LRB- Λακεδαιμων , Lakedaimon -RRB- , while the name Sparta referred to its main settlement on the banks of the Eurotas River in Laconia , in south-eastern Peloponnese .. city-state. city-state. Eurotas River. Eurotas ( river ). Laconia. Laconia. Peloponnese. Peloponnese. Around 650 BC , it rose to become the dominant military land-power in ancient Greece .. ancient Greece. ancient Greece. Given its military pre-eminence , Sparta was recognized as the overall leader of the combined Greek forces during the Greco-Persian Wars .. Greco-Persian Wars. Greco-Persian Wars. Between 431 and 404 BC , Sparta was the principal enemy of Athens during the Peloponnesian War , from which it emerged victorious , though at a great cost of lives lost .. Peloponnesian War. Peloponnesian War. Athens. Classical Athens. Sparta 's defeat by Thebes in the Battle of Leuctra in 371 BC ended Sparta 's prominent role in Greece .. Thebes. Thebes, Greece. Battle of Leuctra. Battle of Leuctra. However , it maintained its political independence until the Roman conquest of Greece in 146 BC .. Roman conquest of Greece. Roman Greece. 146 BC. Battle of Corinth ( 146 BC ). It then underwent a long period of decline , especially in the Middle Ages , when many Spartans moved to live in Mystras .. Middle Ages. Middle Ages. Mystras. Mystras. Modern Sparta is the capital of the Greek regional unit of Laconia and a center for the processing of goods such as citrus and olives .. Laconia. Laconia. Modern Sparta. Sparti. Sparta was unique in ancient Greece for its social system and constitution , which completely focused on military training and excellence .. ancient Greece. ancient Greece. constitution. constitution. Its inhabitants were classified as Spartiates -LRB- Spartan citizens , who enjoyed full rights -RRB- , mothakes -LRB- non-Spartan free men raised as Spartans -RRB- , perioikoi -LRB- freedmen -RRB- , and helots -LRB- state-owned serfs , enslaved non-Spartan local population -RRB- .. mothakes. Mothax. perioikoi. Perioeci. helots. helots. Spartiates underwent the rigorous agoge training and education regimen , and Spartan phalanges were widely considered to be among the best in battle .. agoge. agoge. phalanges. phalanx formation. Spartan women enjoyed considerably more rights and equality to men than elsewhere in the classical world .. Sparta was the subject of fascination in its own day , as well as in the West following the revival of classical learning .. This love or admiration of Sparta is known as Laconism or Laconophilia .. Laconism or Laconophilia. laconophilia. At its peak around 500 BC the size of the city would have been some 20,000 -- 35,000 free residents , plus numerous helots and perioikoi -LRB- `` dwellers around '' -RRB- .. perioikoi. Perioeci. helots. helots. At 40,000 -- 50,000 it was one of the largest Greek cities ; however , according to Thucydides , the population of Athens in 431 BC was 360,000 -- 610,000 , making it unlikely that Athens was smaller than Sparta in 5th century BC .. Athens. Classical Athens. The French classicist Francois Ollier in his 1933 book Le mirage spartiate -LRB- `` The Spartan Mirage '' -RRB- warned that a major scholarly problem regarding Sparta is that all the surviving accounts of Sparta were written by non-Spartans who often presented an excessively idealized image of Sparta .. Ollier 's theory of the `` Spartan mirage '' has been widely accepted by scholars .
related.