Another ruler of it introduced the sarissa, a twenty foot pike, which allowed him to win at Crocus Field and Chaeronea before being killed by his bodyguard Pausanias.  
One of its rulers traded blows with the Aetolian League before signing the Treaty of Phoenice, in which he renounced an alliance formed with Hannibal after Cannae.  Lucius Aemilius Paulus defeated another of its rulers at Pydna after his aforementioned father had lost at Cynoscephalae.  Another ruler of it introduced the sarissa, a twenty foot pike, which allowed him to win at Crocus Field and Chaeronea before being killed by his bodyguard Pausanias.  His son would expand this place's control at battles like Granicus, Issus, and Gaugamela, where he defeated Darius III and conquered Persia.  For 10 points, name this kingdom home to Phillip II and Alexander the Great.
One of its rulers traded blows with the Aetolian League before signing the Treaty of Phoenice, in which he renounced an alliance formed with Hannibal after Cannae.  
Macedon [do not accept "Macedonia"]