(O"Brien p.20) With this knowledge, Alexander would go on to complete one military victory after another. The teachings ended in 340 BC when Aristotle left Pella while Alexander was sixteen years of age.
By this time, Philip has expanded the Macedonian empire all the way to Asia. Being so far away from Pella to govern the city efficiently, Philip appointed Alexander as regent of Macedon. This shows that Alexander has had experience in the art of war. Not too long after this ruling, the Maedi, a quarrelsome Thracian tribe, challenged the power of Macedonian leadership. Alexander quickly led an army to the Upper Strymon, where the uprising was restrained. He captured the center of operations and reestablished it as a Macedonian colony. He renamed it Alexandropolis. .
Philip, who is now losing his attempts to capture Byzantium and Perinthus, is joined by Alexander in hopes to have better success northward towards the Danube. This time, Philip's efforts rewarded victory. On the return home though, the Macedonian army encountered a Thriballian resistance. It is said that Alexander saved Philip's life during this battle. ( But the battle of Chaeronea was a crucial turning point in Alexander's life. At the age of eighteen, Alexander would confirm his status a crown prince and show his ability to lead an army into battle while at the same time, becoming a hero. The Thebans and Athenians were the opposing army. Philip was the take the right, while Alexander flanked from the left. The battle was won with the Macedonian army still standing. Thebes was punished for their role at Chaeronea, but Athens was spared on the terms of an alliance.
Then, sometime in the summer of 336 BC, another royal wedding was to take in Aegae place for the king of the Macedonians. This time the marriage was going to be between King Alexander of Epirus and Cleopatra, Philip's daughter. Seeing this as a big event, Philip invited high ranking guests and state envoys from all over Greece.