Editing Epaminondas (section)

====Fourth invasion of the Peloponnesus (362&nbsp;BC)====
{{Main|Battle of Mantinea (362 BC)}}
In the face of this increasing opposition to Theban dominance, Epaminondas launched his final expedition into the Peloponnese in 362&nbsp;BC. The immediate goal of the expedition was to subdue Mantinea, which had been opposing Theban influence in the region. Epaminondas brought an army drawn from Boeotia, Thessaly and Euboea. He was joined by Tegea, which was the center of local opposition to Mantinea, Argos, Messenia, and some of the Arcadians. Mantinea, on the other hand, had requested assistance from Sparta, Athens, Achaea and the rest of Arcadia, so that almost all of Greece was represented on one side or the other.{{sfn|Tritle|1997|pp=26{{ndash}}27}}

This time the mere presence of the Theban army was not enough to cow the opposition. Since time was passing and the Mantinean alliance showed no signs of capsizing, Epaminondas decided that he would have to break the stalemate. Hearing that a large Lacedaemonian force was marching to Mantinea, and that Sparta was practically undefended, he planned an audacious night-time march on Sparta itself. However, the Spartan king [[Archidamus III|Archidamus]] was alerted to this move by an informant, probably a Cretan runner, and Epaminondas arrived to find the city well-defended.{{sfn|Stylianou|1998|pp=508{{ndash}}510}} Although he did attack the city, he seems to have drawn off relatively quickly on discovering that he had not, after all, surprised the Spartans. Furthermore, the Lacedaemonian and Mantinean troops which had been stationed at Mantinea had marched to Sparta during the course of the day, and dissuaded Epaminondas from attacking again. Now hoping that his adversaries had left Mantinea defenseless in their haste to protect Sparta, Epaminondas counter marched his troops back to his base at Tegea, and then dispatched his cavalry to Mantinea. However, a clash outside the walls of Mantinea with Athenian cavalry foiled this strategy as well.{{sfn|Stylianou|1998|pp=510{{ndash}}512}} Realising that the time allotted for the campaign was drawing to a close, and reasoning that if he departed without defeating the enemies of Tegea, Theban influence in the Peloponnesus would be destroyed, he decided to stake everything on a pitched battle.

What followed on the plain in front of Mantinea was the largest hoplite battle in Greek history. Epaminondas had the larger army, 30,000 infantry and 3,000 cavalry, whilst his opponents numbered 20,000 infantry and 2,000 cavalry.{{sfn|Tritle|1997|pp=93{{ndash}}94}}Xenophon says that, having decided to fight, Epaminondas arranged the army into battle order, and then marched it in a column ''parallel'' to the Mantinean lines, so that it appeared that the army was marching elsewhere, and would not fight that day. Having reached a certain point in the march, he then had the army down arms, so it appeared they were getting ready to camp. Xenophon suggests that "by so doing he caused among most of the enemy a relaxation of their mental readiness for fighting, and likewise a relaxation of their readiness as regards their array for battle".{{sfn|Xenophon|1921|p=221}} The whole column, which had been marching right-to-left past the front of the Mantinean army then 'right-faced', so that they were now in a battle line, facing the Mantineans. Epaminondas, who had been at the head of the column (now the left wing), brought some companies of infantry from the extreme right wing, behind the battle line, to reinforce the left wing. By this, he recreated the strengthened left-wing that Thebes had fielded at Leuctra (this time probably made up by all the Boeotians, and not just the Thebans as at Leuctra). On the wings he placed strong forces of cavalry strengthened by light-infantry.{{sfn|Stylianou|1998|pp=514{{ndash}}516}}

Epaminondas then gave the order to advance, catching the enemy off guard, and causing a furious scramble in the Mantinean camp to prepare for battle. The battle unfolded as Epaminondas had planned.{{sfn|Stylianou|1998|pp=516{{ndash}}518}} The cavalry forces on the wings drove back the Athenian and Mantinean cavalry opposite them. Diodorus says that the Athenian cavalry on the Mantinean right wing, although not inferior in quality, could not withstand the missiles from the light-troops that Epaminondas had placed among the Theban cavalry. Meanwhile, the Theban infantry advanced. Xenophon evocatively describes Epaminondas's thinking: "[he] led forward his army prow on, like a trireme, believing that if he could strike and cut through anywhere, he would destroy the entire army of his adversaries. As at Leuctra, the weakened right wing was ordered to hold back and avoid fighting. In the clash of infantry, the issue briefly hung in the balance, but then the Theban left-wing broke through the Spartan line, and the entire enemy phalanx was put to flight. However, at the height of the battle, Epaminondas was mortally wounded by a Spartan, and died shortly thereafter. Following his death, the Thebes and allies made no effort to pursue the fleeing enemy; a testament to Epaminondas's centrality to the war effort.{{sfn|Hanson|1993|p=146}}{{sfn|Tritle|1997|p=94}}{{sfn|Stylianou|1998|pp= 518{{ndash}}519}}