Philip II of Macedon spent several years in Thebes as a hostage, and paid attention to Epaminondas' innovations. When he got home he raised a revolutionary new infantry force, which was to change the face of the Greek world. Phillip's phalangites were the first force of professional soldiers in Ancient Greece (apart from Sparta). They were armed with much longer spears and were drilled more thoroughly in more complex tactics and manoeuvres. More importantly, though, Phillip's phalanx was part of a multi-faceted, combined force that included a variety of skirmishers and cavalry, most notably his famous Companion cavalry. 