Moreover, the Athenians had become more and more alienated from Thebes. The ancient antipathy between these two neighbors had for a time been overlaid by common fear of Sparta. But as soon as Thebes had reëstablished her authority in Bœotia, the jealousies of Athens again began to arise. In 374 B.C., she had concluded a peace with the Spartans, without the concurrence of Thebes; which peace was broken almost as soon as made, by the Spartans themselves, in consequence of the proceedings of Timotheus at Zakynthus. The Phokians,—against whom, as having been active allies of Sparta in her invasions of Bœotia, Thebes was now making war,—had also been ancient friends of Athens, who sympathized with their sufferings.[334] Moreover, the Thebans on their side probably resented the unpaid and destitute condition in which their seamen had been left by Timotheus at Kalauria, during the expedition for the relief of Korkyra in the preceding year;[335] an expedition of which Athens alone reaped both the glory and the advantage. Though they remained members of the confederacy, sending deputies to the congress at Athens, the unfriendly spirit on both sides continued on the increase, and was farther exasperated by their violent proceeding against Platæa in the first half of 372 B.C. [334] Xen. Hellen. vi, 3, 1. [335] Demosthen. cont. Timoth. p. 1188, s. 17. During the last three or four years, Platæa, like the other towns of Bœotia, had been again brought into the confederacy under Thebes. Reëstablished by Sparta after the peace of Antalkidas as a so-called autonomous town, it had been garrisoned by her as a post against Thebes, and was no longer able to maintain a real autonomy after the Spartans had been excluded from Bœotia in 376 B.C. While other Bœotian cities were glad to find themselves emancipated from their philo-Laconian oligarchies and rejoined to the federation under Thebes, Platæa,—as well as Thespiæ,—submitted to the union only by constraint; awaiting any favorable opportunity for breaking off, either by means of Sparta or of Athens. Aware probably of the growing coldness between the Athenians and Thebans, the Platæans were secretly trying to persuade Athens to accept and occupy their town, annexing Platæa to Attica;[336] a project hazardous both to Thebes and Athens, since it would place them at open war with each other, while neither was yet at peace with Sparta. [336] Diodor. xv, 46. I do not know from whom Diodorus copied this statement; but it seems extremely reasonable.