History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
The difference, then, which arose after the ten years, and the breaking up of the treaty, and the subsequent course of hostilities, I will now relate.
When, then, the fifty years' treaty had been concluded, and the [*](αἱ ξυμμαχίαι.] Poppo remarks, in his note on 48. 1, on this use of the plural noun with reference to a single alliance; but does not offer any explanation of it. Probably it arises from the separate ratification of the alliance by each of the two states so that it may be regarded as a twofold transaction.) alliance afterwards, the embassies from the Peloponnese, which had been summoned for that business, returned from Lacedaemon. Accordingly the rest went home;