Born in
Pella, Philip was the youngest son of the king
Amyntas III and
Eurydice II. In his youth, (c. 368–365 BC) Philip was a hostage in
Thebes, which was the leading city of
Greece during the
Theban hegemony. While a captive there, Philip received a military and diplomatic education from
Epaminondas, became
eromenos of
Pelopidas
, and lived with
Pammenes, who was an enthusiastic advocate of the
Sacred Band of Thebes. In
364 BC, Philip returned to Macedon. The deaths of Philip's elder brothers,
King Alexander II and
Perdiccas III, allowed him to take the throne in
359 BC. Originally appointed
regent for his infant nephew
Amyntas IV, who was the son of Perdiccas III, Philip managed to take the kingdom for himself that same year.
Philip's military skills and expansionist vision of Macedonian greatness brought him early success. He had however first to re-establish a situation which had been greatly worsened by the defeat against the
Illyrians in which King Perdiccas himself had died. The
Paionians and the
Thracians had sacked and invaded the Eastern regions of the country, while the
Athenians had landed, at
Methoni on the coast, a contingent under a Macedonian pretender called
Argaeus. Using diplomacy, Philip pushed back Paionians and Thracians promising tributes, and crushed the 3,000
Athenian hoplites (359). Momentarily free from his opponents, he concentrated on strengthening his internal position and, above all, his army. His most important innovation was doubtless the introduction of the
phalanx infantry corps, armed with the famous
sarissa, an exceedingly long spear which was intended mostly to counter cavalry (at the time, the most important army corps in Macedon).
Philip had married Audata, great-granddaughter of the Illyrian king of
Dardania, Bardyllis. However, this did not prevent him from marching against them in 358 and crushing them in a ferocious battle in which some 7,000 Illyrians died (357). By this move, Philip established his authority inland as far as
Lake Ohrid.
He also used the
Social War as an opportunity for expansion. He agreed with the Athenians, who had been so far unable to conquer
Amphipolis, which commanded the
gold mines of
Mount Pangaion, to lease it to them after its conquest, in exchange for
Pidna (lost by Macedon in 363). However, after conquering Amphipolis, he kept both the cities (357). As Athens declared war against him, he allied with the
Chalcidian League of
Olynthus. He subsequently conquered
Potidaea, this time keeping his word and ceding it to the League in 356. One year before Philip had married the
Epirote princess
Olympias, who was the daughter of the king of the
Molossians.
In
356 BC, Philip also conquered the town of
Crenides, on
Thasos island, and changed its name to
Philippi: he established a powerful garrison there to control its mines, which granted him much of the gold later used for his campaigns. In the meantime, his general
Parmenio defeated the Illyrians again. Also in
356 Alexander was born, and Philip's race horse won in the Olympics. In 355–354 he besieged
Methone, the last city on the
Thermaic Gulf controlled by Athens. During the siege, Philip lost an eye. Despite the arrival of two Athenians fleets, the city fell in 354. Philip also attacked
Abdera and Maronea, on the
Thracian sea-board (354–353).
Involved in the
Sacred War which had broken out in Greece, in the summer 353 he invaded
Thessaly, defeating 7,000
Phocians under the brother of
Onomarchus. The latter however defeated Philip in the two succeeding battles. Philip returned to Thessaly the next summer, this time with an army of 20,000 infantry and 3,000 cavalry including all Thessalian troops. In the
Battle of Crocus Field 6,000 Phocians fell, while 3,000 were taken as prisoners and later drowned. This battle granted Philip an immense prestige, as well the free acquisition of
Pherae. Philip was also
tagus of
Thessaly, and he claimed as his own
Magnesia, with the important harbour of
Pagasae. Philip did not attempt to advance into central Greece because the Athenians, unable to arrive in time to defend Pagasae, had occupied Thermopylae.
Hostilities with Athens did not yet take place, but Athens was threatened by the Macedonian party which Philip's gold created in
Euboea. From 352 to
346 BC, Philip did not again come south. He was active in completing the subjugation of the
Balkan hill-country to the west and north, and in reducing the Greek cities of the coast as far as the Hebrus (
Maritza). To the chief of these coastal cities, Olynthus, Philip continued to profess friendship until its neighboring cities were in his hands.
In
349 BC, Philip started the siege of Olynthus, which, apart from its strategic position, housed his relatives Arrhidaeus and Menelaus, pretenders to the Macedonian throne. Olynthus had at first allied itself with Philip, but later shifted its allegiance to Athens. The latter, however, did nothing to help the city, its expeditions held back by a revolt in
Euboia (probably paid by Philip's gold). The Macedonian king finally took Olynthus in
348 BC and razed the city to the ground. The same fate was inflicted on other cities of the Chalcidian peninsula.
In 346 BC, he intervened effectively in the war between Thebes and the Phocians, but his wars with Athens continued intermittently.
Macedon and the regions adjoining it having now been securely consolidated, Philip celebrated his
Olympic games at
Dium. In
347 BC, Philip advanced to the conquest of the eastern districts about the Hebrus, and compelled the submission of the
Thracian prince
Cersobleptes. Meanwhile, Athens had made overtures for peace, and when Philip, in
346 BC, again moved south, peace was sworn in Thessaly. With key Greek city-states in submission, Philip turned to
Sparta; he sent them a message, "You are advised to submit without further delay, for if I bring my army into your land, I will destroy your farms, slay your people, and raze your city." Their reply was "If". Philip and Alexander would both leave them alone. Later, the Macedonian arms were carried across Epirus to the
Adriatic Sea. In
342 BC, Philip led a great military expedition north against the
Scythians, conquering the Thracian fortified settlement Eumolpia to give it his name,
Philippopolis (modern
Plovdiv).
In
340 BC, Philip started the siege of
Perinthus. Philip began another siege in
339 BC of the city of
Byzantium. After unsuccessful sieges of both cities, Philip's influence all over Greece was compromised.
However, Philip successfully reasserted his authority in the Aegean by defeating an alliance of Thebans and Athenians at the
Battle of Chaeronea in
338 BC. Around
300 BC a memorial consisting of a marble lion was built to honor the
Sacred Band of Thebes for their bravery and still exists today. Philip created and led the
League of Corinth in
337 BC. Members of the League agreed never to wage war against each other, unless it was to suppress
revolution. Philip was elected as leader (
hegemon) of the army of invasion against the
Persian Empire. In
336 BC, when the invasion of Persia was in its very early stage, Philip was assassinated, and was succeeded on the throne of Macedon by his son
Alexander III.