Ancient Greek warfare of the phalanx to its logical completion, arming his 'phalangites' (for they were assuredly not hoplites) with a fearsome pike, the 'sarissa'. Much more lightly armored, the Macedonian phalanx was not so much a shield-wall as a spear-wall. The Macedonian phalanx was a supreme defensive formation, but was not intended to be decisive offensively; instead, it was used to pin down the enemy infantry, whilst more mobile forces (such as cavalry) outflanked them. This 'combined arms' approach was furthered by the extensive use of skirmishers, such as peltasts. Tactically, Phillip absorbed the lessons of centuries of warfare in Greece. He
Regions of ancient Greece () was an ancient Greek region in Epirus. "Macedonia" or "Macedon" (from , "") was an ancient Greek kingdom and region, centered in the northeastern part of the Greek peninsula, bordered by Epirus to the west, Paionia to the north, Thrace to the east and Thessaly to the south. Early geographers put river Strimon as the eastern border of Macedonia with Thrace. However, as kingdom of Macedon was expanding and was pushing east the Thracian tribes, river Nestos was regarded as the eastern border of the region and Sintice, Odomantis and Edonis were included in it. Traditionally part of Thrace