History of the Peloponnesian War

And later on, when they had at length more completely reached this condition of affairs, they made the expedition against Troy.

And it was, as I think, because Agamemnon surpassed in power the princes of his time that he was able to assemble his fleet, and not so much because Helen's suitors, whom he led, were bound by oath to Tyndareus.[*](According to the post-Homeric legend, all who paid their court to Helen engaged to defend the man of her choice against all wrong. cf. Isoc. 10.40; Paus. 3.20. 9; 3.10.9.)