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byname Philip Of Macedon 18th king of Macedonia (359–336 BC), who restored internal peace to his country and then, by 339, had gained domination over all Greece by military and diplomatic means, thus laying the foundations for its expansion under his son Alexander III the Great.

Early life and accession.

Philip was a son of Amyntas III. In his boyhood he saw the Macedonian kingdom disintegrating while his elder brothers Alexander II and Perdiccas III, who each reigned for a few years, strove unsuccessfully against insubordination of their regional vassal princes, intervention of the strong Greek city Thebes, and invasion by the Illyrians of the northwest frontier.

Philip himself spent some time as a hostage at Thebes, the leading city (with Athens) of this decade (370–360 BC), where the great Epaminondas, the most inventive tactician of all Greek generals until then, was in charge of the best army in Greece. These were probably the most formative years of Philip's education. When he returned to Macedonia his brother Perdiccas soon found him ready for a command.

Philip came to the throne suddenly and unexpectedly in 359, when Perdiccas was killed meeting an Illyrian invasion. The Illyrians prepared to close in; the Paeonians were raiding from the north, and two claimants to the throne were supported by foreign powers. In this crisis Philip showed a good sense of priorities by buying off his dangerous neighbours and, with a treaty, ceding Amphipolis to Athens. He used the time gained in military preparations. The army that later conquered Persia was developed all through his reign, but the decisive innovations in arms—the sarissa, a pike nearly half as long again as the spear of the Greeks—tactics, and training belong probably to this first year.

Macedonian expansion.

In 358 he invaded Paeonia, and then he defeated the Illyrians decisively, in a battle that already suggests a master of war. The next year his marriage with Olympias, the Molossian princess of Epirus (the mother of Alexander the Great), helped to stabilize his western frontier. Now he ventured to antagonize Athens by recapturing Amphipolis, the strategic key securing the eastern frontier and giving access into Thrace; and in 356 he took the west Thracian Crenides (renamed by him Philippi), a place newly founded to exploit new finds of silver and gold in Mount Pangaeum. These successes frightened his neighbours into forming a coalition against him, which was joined by Athens; but it achieved nothing.

The 10-year “war for Amphipolis” with Athens showed that the Athenians, with all their naval power, were quite unable to damage the continental and military power of Macedonia or even to save their own allies from Philip's attacks. Meanwhile he twice penetrated deeply into Thrace. And in the south a Thessaly divided against itself gave him an entry into Greece. These same 10 years saw central Greece immersed in the Sacred War to liberate Delphi from its occupation by the Phocians, enabling Philip to intervene as the ally of Thebes and the Thessalian League of city states. His only great defeat in the field came in Thessaly in 353, owing (it seems) to overconfidence and failure of reconnaissance. The next year he retrieved it with a spectacular victory, which forced the Athenians to occupy Thermopylae and bar his path to the south.

Presidency of the Thessalian League.

Characteristically, Philip declined the trial of strength, prepared to wait for six years until he could gain Thermopylae by negotiation and without striking a blow. Meanwhile his Thessalian victory earned him election as president (archōn) of the Thessalian League (probably 352), a position unique for a foreigner in a Greek confederation and one that was to bind Thessaly to the kings of Macedonia for 150 years and more.

Philip's capture of Olynthus and annexation of Chalcidice in 348, enslaving the Olynthians and other of the Chalcidians, was disquieting to many. The Greeks themselves occasionally were brutal to small cities, but Olynthus was a large city. Philip's enemies could affect a high moral tone and contempt for a barbarous Macedonian, but even his friends might have wondered whether he ought to be allowed into the heart of Greece with an army. Yet there were many ways in which he could serve them. Particularly, he could finish the Sacred War, which the Thessalians, Thebans, and others still could not finish for themselves. Athens could not prevent this now and had reason to fear that Philip's next campaign in Thrace (346) might challenge its own control of the sea route to southern Russia, its main source for imported corn. Significantly, however, it was Philip, and not Athens, who made the first overtures for peace, though all the military initiatives lay in his own hand. His plans for the future, in Greece and farther afield, included Athens as a willing ally, not as a defeated enemy.

Even before the peace with Athens was ratified (346), the Athenian publicist Isocrates was inviting Philip to reconcile the four leading cities of Greece and to lead a united Greek alliance in a war of expansion against Persia. A step in this direction was Philip's intervention now to end the Sacred War, in recognition of which he was admitted to membership of the Delphic Amphictyony—an association of neighbouring states. The votes of the Thessalians and their clients gave him a control of its council, which could be used on occasion for political and diplomatic ends.

He lost no opportunity in the next years (346–343) of penetrating Greece without war, by winning and buying friends among the politicians of the smaller cities and intervening occasionally with subsidies or a force of mercenaries in their local disturbances. This policy made him some enemies, too, and it played into the hands of the great orator Demosthenes and others at Athens. Demosthenes saw Philip now as a bar to Athenian greatness and a threat to its freedom and existence; he talked tirelessly to warn the Athenians of the danger and to convince the Greeks in general that it was their danger too. Philip in these years conciliated Athens in small ways even under provocation, but he came to see that Demosthenes and the anti-Macedonians were beyond conciliation (343–342). Meanwhile, he reasserted his suzerainty over the neighbouring Illyrians, tightened his grip on Thessaly, and in 342 began the series of campaigns in Thrace that enabled him in two years to annex great parts of it as a province, and finally to demonstrate his power against the Scythians settled on the southern banks of the Danube Delta. The events in Thrace caused two of his Greek allies, the cities of Perinthus (later called Heraclea, present-day Marmaraereğlisi) and Byzantium, to review their position, and his coercion of them led to the two great sieges that showed the development of his artillery and allied arms, of which his son Alexander was to make greater use in Asia.

The declaration of war by Athens in 340 enabled him to raise the two sieges without undue loss of face, though he had failed to establish a threat to the Athenian corn route to southern Russia. Athens was to be intimidated now by invasion of its territory through central Greece, where the key position was held by Thebes, his ally hitherto, but of late a dissatisfied and recalcitrant one. His services to it in the Sacred War had been more than offset by his new position as its successful rival for leadership in and through the Amphictyony, and his moves toward hegemony in Greece could be seen in Thebes as encroachments.

Victory of Chaeronea.

When Philip swept south with his army in November 339, he hoped to rush the Thebans into honouring their alliance and letting him through into Attica. The Thebans listened instead to Demosthenes and to their own instinct of self-preservation. The Greek alliance became something formidable with the accession of Thebes, and Philip was forced, as a contemporary orator put it with only a mild exaggeration, “to stake his all on the issue of one short day.” Chaeronea was a famous victory, gained by decisive blows of Philip's cavalry. His real skill as a general can be seen, though dimly, in a manoeuvre of controlled retreat aimed at dislocating the advancing Greeks and creating gaps for the cavalry to strike. By winning this battle he had won the war.

In the various peace treaties with the Greek states, Thebes had to admit a Macedonian garrison, and its democratic constitution was replaced by a pro-Macedonian government; but Athens suffered neither invasion of its territory nor interference with its democracy and was not disarmed by dismantling of the walls or surrender of the navy. For Philip, Athens was the one Greek state from which he needed not neutrality or unwilling alliance but active cooperation. All past experience had shown that wars against Persia succeeded only when the Persians were denied the use of the Aegean, and for this the great Athenian navy was the first need.

In Greece (outside Thessaly), Philip could have had no illusions about his own unpopularity, except among those of the well-to-do who were attracted by his court and his patronage; some cities also (especially the neighbours of Sparta) were glad to lean on Macedonia for support against an ancient enemy. Philip intended to involve all the Greeks with the Persian war. So Isocrates had advised him eight years before; but on the details of the ways and means he had no advice to offer. Philip himself organized the Greeks now to keep the peace with him and with each other and to support him in the Persian war overseas. In the constitutional details of his settlement of Greece he may well have had the help of Aristotle, free from his recent duties as tutor of the young Alexander.

The League of Corinth.

Philip's so-called League of Corinth, established in 337, was an organization designed to preserve and perpetuate a general peace (koinē eirēnē), inaugurated when the delegates of all the states of Greece (except Sparta) and the islands swore to abide by it and to recognize Philip as president (hēgemōn) for this purpose. The general peace was a political innovation of the Greeks themselves, used several times in the past 50 years in attempts to stabilize affairs while promoting this or that hegemony. The peace had never lasted long because the leading Greek states had neither the power nor the mutual trust to create an effective organization for collective action against aggressors.

Philip designed a council of representatives from all the states (synedrion), which was empowered to deliberate and decide on action to be taken in the event of the peace being broken or threatened. After the decisions were made, their execution lay with Philip as hēgemōn. The states were under obligation to supply troops or ships to the hēgemōn on demand, by quotas corresponding to their voting power on the council. Though neither Philip nor Macedonia had representatives on the council, it was the knowledge that the hēgemōn had the power of Macedonia in his hand that made this organization effective. As it happened, Corinth, where the inaugural meeting was held, was one of only three Greek cities with a Macedonian garrison, a fact the significance of which can have been lost on nobody.

Last years.

Philip was wise, no doubt, to build on the foundation of the earlier practice of the Greeks themselves and also to refrain from organizing them in any permanent alliance that would have recalled too much the unpalatable experiences of the past. He was not, however, a Greek politician or even a Greek, but king of the Macedonians; and he cannot possibly have seen the settlement of Greece—as most modern historians have seen it—as the culmination of his life's work. For him it culminated nothing and was not even an end in itself but only a means. Chaeronea had brought the Greeks to order, and his plans required that they should stay in order now. The synedrion at Corinth heard his program for a Persian war and duly acclaimed it early in 337. Early the next year an advance force of the Macedonian army crossed to Asia Minor. Philip would lead the grand army into Asia presently, and the Greeks would be with him.

This meteor fizzled out. The subtle, pliant, patient, calculating diplomatist, master of timing in politics and war, ended his life in a tale of irresponsible incompetence. The historian Theopompus, who saw Philip at close quarters, made much of his vices, his love of drink and debauchery, and his wild extravagance with money. Allowance made for this notably faultfinding and puritanical writer, Philip's character did contain some real ambiguities, extending into his domestic life. His “political marriages” were mostly opportune symbols of goodwill toward princes or groups worth conciliating, but his last marriage, in 338, to the Macedonian Cleopatra, led to a final break with Olympias, his queen, who left the country accompanied by the crown prince Alexander. Though Olympias was unpopular at court and though Cleopatra's connections were powerful and important, it was not “politic” to put the succession in jeopardy. Philip showed that he had never intended this result, by taking trouble to be reconciled with Alexander. The tradition that makes him infatuated with Cleopatra is probably right. If so, he misjudged fatally the amount of harm that could be done by marrying her.

With the preparations far advanced for the crossing into Asia, at the grand celebration of his daughter Cleopatra's marriage to Alexander of Epirus (brother of Olympias), Philip was assassinated by Pausanias, a young Macedonian noble with a bitter grievance against the young queen's uncle Attalus and against Philip for denying him justice. This was the official explanation, and Pausanias himself could add nothing to it; he was killed on the spot. Suspicion fell on Olympias and Alexander, those with most to gain from Philip's death, and many modern interpreters have followed it. Aristotle, however, clearly did not believe it. In his Politics a few years later he used this incident as an example of a monarch murdered for private and personal motives—which would have been a puerile indiscretion if either he or the world in general had ever taken the canard seriously.