The battle was fought at Tanagra in Boeotia. After heavy loss on both sides, victory declared for the Lacedaemonians and their allies. After entering the Megarid and cutting down the fruit trees, the Lacedaemonians returned home across Geraneia and the isthmus.
Sixty-two days after the battle the Athenians marched into Boeotia under the command of Myronides, defeated the Boeotians in battle at Oenophyta, and became masters of Boeotia and Phocis. They dismantled the walls of the Tanagraeans, took a hundred of the richest men of the Opuntian Locrians as hostages, and finished their own long walls. This was followed by the surrender of the Aeginetans to Athens on conditions; they pulled down their walls, gave up their ships, and agreed to pay tribute in future. The Athenians sailed round Peloponnese under Tolmides, son of Tolmaeus, burnt the arsenal of Lacedaemon, took Chalcis, a town of the Corinthians, and in a descent upon Sicyon defeated the Sicyonians in battle.
Meanwhile the Athenians in Egypt and their allies were still there, and encountered all the vicissitudes of war. First the Athenians were masters of Egypt, and the King sent Megabazus a Persian to Lacedaemon with money to bribe the Peloponnesians to invade Attica and so draw off the Athenians from Egypt. Finding that the matter made no progress, and that the money was only being wasted, he recalled Megabazus with the remainder of the money, and sent Megabuzus, son of Zopyrus, a Persian, with a large army to Egypt.
Arriving by land he defeated the Egyptians and their allies in a battle, and drove the Hellenes out of Memphis, and at length shut them up in the island of Prosopitis, where he besieged them for a year and six months. At last, draining the canal of its waters, which he diverted into another channel, he left their ships high and dry and joined most of the island to the mainland, and then marched over on foot and captured it. Thus the enterprise of the Hellenes came to ruin after six years of war. Of all that large host a few travelling through Libya reached Cyrene in safety, but most of them perished. And thus Egypt returned to its subjection to the King, except Amyrtaeus, the king in the marshes, whom they were unable to capture from the extent of the marsh; the marshmen being also the most warlike of the Egyptians. Inaros, the Libyan king, the sole author of the Egyptian revolt, was betrayed, taken, and crucified. Meanwhile a relieving squadron of fifty vessels had sailed from Athens and the rest of the confederacy for Egypt. They put in to shore at the Mendesian mouth of the Nile, in total ignorance of what had occurred. Attacked on the land side by the troops, and from the sea by the Phoenician navy, most of the ships were destroyed; the few remaining being saved by retreat. Such was the end of the great expedition of the Athenians and their allies to Egypt.
Meanwhile Orestes, son of Echecratidas, the Thessalian king, being an exile from Thessaly, persuaded the Athenians to restore him. Taking with them the Boeotians and Phocians their allies, the Athenians marched to Pharsalus in Thessaly. They became masters of the country, though only in the immediate vicinity of the camp; beyond which they could not go for fear of the Thessalian cavalry. But they failed to take the city or to attain any of the other objects of their expedition, and returned home with Orestes without having effected anything. Not long after this a thousand of the Athenians embarked in the vessels that were at Pegae (Pegae, it must be remembered, was now theirs), and sailed along the coast to Sicyon under the command of Pericles, son of Xanthippus. Landing in Sicyon and defeating the Sicyonians who engaged them, they immediately took with them the Achaeans and, sailing across, marched against and laid siege to Oeniadae in Acarnania. Failing however to take it, they returned home.
Three years afterwards a truce was made between the Peloponnesians and Athenians for five years. Released from Hellenic war, the Athenians made an expedition to Cyprus with two hundred vessels of their own and their allies, under the command of Cimon. Sixty of these were detached to Egypt at the instance of Amyrtaeus, the king in the marshes; the rest laid siege to Kitium, from which, however, they were compelled to retire by the death of Cimon and by scarcity of provisions. Sailing off Salamis in Cyprus, they fought with the Phoenicians, Cyprians, and Cilicians by land and sea, and, being victorious on both elements departed home, and with them the returned squadron from Egypt. After this the Lacedaemonians marched out on a sacred war, and, becoming masters of the temple at Delphi, it in the hands of the Delphians. Immediately after their retreat, the Athenians marched out, became masters of the temple, and placed it in the hands of the Phocians.