To which there could many answers at the Battle of Mantinea, but it seems there's a much easier answer.
曼提尼亚战役可能会给我们很多答案,但以下的回答可能是最直接的
古希腊历史简介课程节选 : 耶鲁公开课
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Thucydides has an interesting passage in there, in which he says that the Spartans win the Battle of Mantinea and Thucydides says that the Spartans did not pursue the hoplite.