The wave even reached Argos, who had never actually been able to control the city-state of Argos, but its power also led to the emergence of a group of pro-Spartan councillors in Argos's political arena, most of whom were now beaten to death with sticks by angry civilians.

In such a wave, the most benefited were undoubtedly the Thebans, as the victors of the battle, Thebes' influence in Greece proper, not only made the remaining Piosian city-states take the initiative to move closer to Thebes, and accelerated the progress of its unification of Piosia, but also the Phorgis, Locis (non-Dionian Lokry, which is located in Central Greece and is divided into two parts, located in the southwest and northwest of the Piosian region), and even the Euphorians are courting Thebes and wanting to form an alliance with it.

The reason was that they saw the weakening of Sparta's power and wanted the military support of a new power to help them defend themselves against the threat. The Phokis and Locis were worried about Thessaly, while the Euphoreans were worried about Athens.

The Thebans were mixed with each other, glad that their strength had been greatly enhanced, and worried that the threat of Sparta had not yet been lifted, and that they might have to add a few more strong enemies: Athens, needless to say, there was already a rift between the two sides; Although Thessaly was an ally, Iason's previous performance had already shown his ambitions, and at this time, he was recruiting troops in the north, and when he led his army south, it was probably the time for the two sides to meet each other.

At the strong suggestion of Peropidas and Ipamilonda (the battle of Leuktra made Ipamilonda the most prestigious man in Thebes), the Theban government decided to ally with the Phorgis, Locris, and Euvians to strengthen itself as soon as possible to meet the challenges that followed.

Since then, Central Greece, with the exception of Attica (Athens), has been under the influence of Thebes.

But Thebes was not the biggest threat to Sparta now, the greatest threat came from the Peloponnese's Arcadian region.

Arcadia is located in the center of the Peloponnese Peninsula, geographically the Laconia region where Sparta is located is blocked by towering mountains on both sides of the east and west, and the south is the sea, only the north side connected to the Arcadia region is relatively low, and the army is more convenient to enter and exit, so since the rise of Sparta, it has been interfering in the affairs of the Arcadian city-states, trying to bring it completely under its control.

It was precisely because of the long-term suppression of Sparta that compared with the rest of Greece, Arcadia never had a city-state that could have some influence in Greece itself, and even before the Corinthian War, due to the disobedience of Mandinia (Mandinia is located in the northeast of Arcadia), he brazenly invaded its territory and completely destroyed its city with water attacks. The ferocity of Sparta did temporarily deter the Acadians, but it also made the Acadians more and more vigilant.

More than ten years later, when Sparta was frequently fighting against Thebes and could not afford to take care of anything else, the exiled Mandinians returned to their homeland one after another and began to work hard to rebuild their homeland. This aroused the vigilance of the Spartans, who soon sent messengers to warn the Mandinians: let them get out of the land immediately, or Sparta would send an army to expel them.

But within a few days, the other city-states of Arcadia sent emissaries to Sparta to intercede on behalf of the Mandinians.

At this time, Sparta was short of manpower and materials because of years of war, and relied more on allies, and the Arcadians contributed a lot in it, so Sparta had to reluctantly agree to their request, of course, the Mandinians also had to promise: to re-serve Sparta as the leader of the alliance, send citizens, and help it fight.

The problem seems to be solved, but it is not. The Mandinians began to build walls and rebuild the city, and in order to prevent further flooding, they even dug new rivers to change the flow of the Orpheus River, and the new design of the city was more strong, unique and difficult to conquer.

While the Mandinians were building the city, they were also secretly doing another important thing. One of their leaders, Lycomedes, came to realize that the city-states of Arcadia had to unite and form an alliance in order to have the confidence to say no to Sparta's unreasonable demands and to protect the Arcadians themselves.

Therefore, Lycomedes went to great lengths to convince the other city-states of Arcadia, and things were going well, because these city-states had been suffering from Sparta for a long time, and with Lycomedes taking the lead, everyone agreed to form a pan-Arcadian alliance with all but a few city-states.

However, there was another dispute over which city-state to choose as the capital of the League: because the city-states of Arcadia were not too different in strength, and no one of the most powerful city-states was strong enough to subdue the others; However, if you choose any city-state at random, you may make it grow rapidly after the alliance is built, which other city-states do not want to see.

It was Lycomedes who made a suggestion: to gather the power of the alliance and build a new city as the capital of the alliance.

Eventually, his proposal was unanimously agreed, and after much discussion, the location of the new city was chosen, and the political structure of the entire alliance was discussed in more detail......

In short, in 371 BC (the twenty-third year of the Dionian kingdom), the preparations for the Pan-Arcadian League were almost complete and began to be implemented in full swing.

Sparta learned that "Arcadia was preparing an alliance", but at this time its war against Thebes was at a critical stage, and it really had no spare power to stop it, and the Arcadian city-states had been sending troops and food to help it fight, so the Spartans pretended not to see it, and wanted to wait until the problem of Thebes was solved, and then go back to deal with the matter.

However, the battle of Leuctra suddenly changed the situation in Greece, and the remaining Acadian city-states were shaken by this, so under the active persuasion of Lycometes, they also began to take the initiative to join the Pan-Arcadian Alliance.

Among these city-states was Tygia, located in the southeast of the Arcadia region, which had long been regarded by Sparta as a staunch ally and a strong gateway to the northern frontier, but now that Tygia had defected, the Spartans could not tolerate it, so the procurators sent emissaries to threaten the Arcadian city-states, demanding that they must dissolve the alliance immediately, or they would be wrathed by the Spartan army.

The Arcadians would not give in, of course, but they also knew that the Spartans were too powerful to fight against them on their own, so they had to seek support from outside forces. The first thing they thought of was Athens.

After the Battle of Leuctra, Athens was pleased with the decline of Sparta's power and worried about the rise of its neighbor Thebes, so it took action by inviting its maritime allies and Peloponnesian city-states to re-swear the previous royal covenant on behalf of Athens, and solemnly stated that the members of the oath should help each other in the event of an enemy attack.

It seems that Athens' action was a continuation of the previous Treaty of Calias signed in Sparta, and a support for Sparta and its allies, which had been defeated in the battlefield, but in fact Athens was trying to expand its influence in the Peloponnese, to usurp the leadership of Sparta, and to draw Persia over.

Several city-states of Mandinia and Arcadia also took part in the oath-taking, and Athens was obliged to help under the agreement, so the Arcadians sent emissaries to Athens.

While the Arcadian envoys were on their way to Athens, a large fleet of ships was sailing across the Adriatic Sea toward the Peloponnese, and it was the Dionian army on the Spartan expedition.

According to the speed of the mobilization of the army of the Holy Kingdom of Dionia, after the order to go to the army is issued, the assembly of the regions can generally be completed within four or five days (in a relatively large and mountainous area like Lucania, it takes a lot of time for the military camp to notify the towns and the citizens of each town to meet with the military camp), even if King Davers has to consult with the Ministry of War to make some military preparations, the time required will not exceed 15 days.

The reason why the army was ordered to go out two months later was because the subsequent truce between Thebes and Sparta and the series of anti-Spartan waves in the Peloponnese attracted the attention of the Dionian high-level, who specially suspended military operations to wait and see how the situation developed, and did not resume until two months later.

In order to prevent the news of the expedition from being discovered by the Spartans in advance, Dioonia declared that it was "going to fight against the Lusitanians, who had repeatedly raided the southern regions of Iberia", so the place of embarkation of the army was not set at Brindisi, but at Crotone.

The 4th Corps was originally in Crotone, and the 1st and 6th Corps, one in the north and the other in the south, were not too far apart, and the three corps soon sailed east in the port of Crotone with a fleet of ships that had already been prepared, escorted by the 1st Fleet.

The huge fleet passed through the heel of Italy, rested overnight in Odrum, and sailed south along the west coast of mainland Greece on the second day after sailing across the Adriatic Sea.

Wherever the fleet passed, the city-states and towns were terrified, such as Corfu Island. The people of Greece have never seen such a large fleet, it has more than 300 troop carriers, more than 500 cargo ships carrying heavy loads, and 550 warships, a total of more than 1,200 ships, spread out on the sea, a length of five or six miles, this is still because the whole fleet chose to go out in the better sea conditions these days, and the ships are more densely arranged.