History of the Peloponnesian War

In this strait the Argives, afraid that, as the result of refusing to renew the treaty with Lacedaemon and aspiring to the supremacy in Peloponnese, they would have the Lacedaemonians, Tegeans, Boeotians, and Athenians on their hands all at once, now hastily sent off Eustrophus and Aeson, who seemed the persons most likely to be acceptable, as envoys to Lacedaemon, with the view of making as good a treaty as they could with the Lacedaemonians, upon such terms as could be got, and being left in peace.

Having reached Lacedaemon, their ambassadors proceeded to negotiate the terms of the proposed treaty.

What the Argives first demanded was that they might be allowed to refer to the arbitration of some state or private person the question of the Cynurian land, a piece of frontier-territory about which they have always been disputing, and which contains the towns of Thyrea and Anthene, and is occupied by the Lacedaemonians. The Lacedaemonians at first said that they could not allow this point to be discussed, but were ready to conclude upon the old terms. Eventually, however, the Argive ambassadors succeeded in obtaining from them this concession:—For the present there was to be a truce for fifty years, but it should be competent for either party, there being neither plague nor war in Lacedaemon or Argos, to give a formal challenge and decide the question of this territory by battle, as on a former occasion, when both sides claimed the victory; pursuit not being allowed beyond the frontier of Argos or Lacedaemon.