The Spartans were resolved to avenge the repulse they had received; and in the summer of B.C. 378 Agesilaus marched with a large army into Boeotia. He was unable, however, to effect any thing decisive, and subsequent invasions were attended with the like result. The Athenians created a diversion in their favour by a maritime war, and thus for two years Boeotia was free from Spartan invasion, Thebes employed this time in extending her dominion over the neighbouring cities. One of her most important successes during this period was the victory gained by Pelopidas over a Lacedaemonian force near Tegyra, a village dependent upon Orchomenus (B.C. 375). Pelopidas had with him only the Sacred Band and a small body of cavalry when he fell in with the Lacedaemonians, who were nearly twice as numerous. He did not, however, shrink from the conflict on this account; and when one of his men, running up to him, exclaimed, "We are fallen into the midst of the enemy," he replied, "Why so, more than they into the midst of us?" In the battle which ensued the two Spartan commanders fell at the first charge, and their men were put to the rout. So signal a victory inspired the Thebans with new confidence and vigour, as it showed that Sparta was not invincible even in a pitched battle, and with the advantage of numbers on her side. By the year 374 B.C. the Thebans had succeeded in expelling the Lacedaemonians from Boeotia, and revived the Boeotian confederacy. They also destroyed the restored city of Plataea, and obliged its inhabitants once more to seek refuge at Athens. The successes of the Thebans revived the jealousy and distrust of Athens. Prompted by these feelings, the Athenians opened negotiations for a peace with Sparta; a resolution which was also adopted by the majority of the allies. A congress was accordingly opened in Sparta in the spring of 371 B.C. The Athenians were represented by Callias and two other envoys; the Thebans by Epaminondas, then one of the polemarchs. The terms of a peace were agreed upon, by which the independence of the various Grecian cities was to be recognised; and the Spartan harmosts and garrisons everywhere dismissed. Sparta ratified the treaty for herself and her allies; but Athens took the oaths only for herself, and was followed separately by her allies. As Epaminondas refused to sign except in the name of the Boeotian confederation, Agesilaus directed the name of the Thebans to be struck out of the treaty, and proclaimed them excluded from it. The peace concluded between Sparta, Athens, and their respective allies, was called the PEACE OF CALLIAS. The result with regard to Thebes and Sparta will appear in the following chapter. CHAPTER XVII. THE SUPREMACY OF THEBES, B.C. 371-361.