25. Themistocles remained all night at his anchorage, ready to renew the conflict on the morrow, but Xerxes, fearful for the fate of his bridge across the Hellespont, ordered the eight hundred remaining ships to sail for its protection, while he and his whole army marched as rapidly as possible for the same point. The number assembled to pass back into Asia was greatly diminished from the hosts which a few months before had so proudly marched to assured victory. Besides those lost in battle, thousands had perished through disease and famine. But the hope of final success was not entirely abandoned, and the Persian general, Mardonius, with three hundred thousand of the best soldiers of the invading army, were left to complete the conquest. 26. With the retreat of Xerxes, the Athenians returned to their city, finding their temples destroyed, and their homes desolated, but they immediately commenced the work of rebuilding, and, amid rejoicings and renewed hopes, the city arose from its ashes. The clash of arms gave place to the din of industry, and the fighting soldier was replaced by the peaceable citizen. 27. In the mean time, Mardonius went into winter quarters in the northern provinces, and during the winter he endeavored to effect by negotiation and bribery what he had failed to accomplish by arms. He succeeded in exciting the jealousy of several of the cities toward each other, so that it was difficult to bring about concert of action, and he succeeded in detaching Thebes entirely from the confederacy, and arraying it against Athens. The Theban force which joined his army became one of the most formidable foes which the allied Greek had to meet. 28. The negotiations continued through the spring, but as summer approached the army of Mardonius was on the move. Sparta was not ready to meet the invader, and the Athenians once more took refuge on their ships, ten months after their return. Mardonius took possession of the city, and this time effectually destroyed it; but as nothing was to be gained by a further stay, he marched his army to Thebes, which became his headquarters. The Spartans were at length ready to march. They saw their city menaced, and their own safety demanded that the forces of Mardonius should be broken. 29. With the aid of their allies they put into the field an army, the largest that the Greeks ever mustered, variously reported as numbering one hundred thousand to one hundred and ten thousand men. These were under the command of the Spartan king, Pausanias. In September they set out for Thebes, and in a few days came up to the Persian army, which was stationed at Plataea, a short distance from Thebes. Here Mardonius had established a fortified camp to which he might retreat if defeated on the field. For eleven days the two armies confronted each other, neither anxious to strike the first blow. Then the supply of water for the Greek camp gave out, and Pausanias fell back to a better position.