This is a possible concise summary:
The text is a transcript of a video by Kings and Generals, a YouTube channel that covers historical topics. The video is about the life and conquests of Alexander the Great, the king of Macedon who inherited a powerful army and a plan to invade the Persian Empire from his father Philip II. The video focuses on how Alexander dealt with the rebellions and challenges in Greece, Thrace, and Illyria after his father's assassination, and how he displayed his military genius, boldness, and audacity in various battles and sieges. The video also mentions the sponsor of the video, Skillshare, an online learning platform that offers thousands of courses on various subjects. The video ends with a teaser for the next episode, which will cover Alexander's invasion of Persia. The video also asks the viewers to like, comment, share, subscribe, and support the channel through Patreon or YouTube memberships.
Here are the key facts extracted from the text:
1. Alexander the Great ascended to the throne of Macedon as Alexander III after the death of his father Philip II.
2. Alexander inherited the new Macedonian army, the Hellenic League, and a Macedonian bridgehead in western Asia Minor from his father.
3. Alexander conducted a dynastic purge of key opponents with his mother Olympias.
4. Alexander sent a loyal friend to Asia Minor to secure the loyalty of generals Parmenion and Attalus.
5. Alexander successfully defeated the Thracians at the Battle of Mount Haemus.
6. Alexander then marched south and secured the submission of the city of Thebes.
7. Alexander convened the Hellenic League at Corinth and had his status as hegemon confirmed.
8. Alexander spent the winter of 335 BC giving his army a crash course in mountain warfare.
9. In the spring of 335 BC, Alexander advanced north to neutralize the rowdy tribes of Thrace and Illyria.
10. Alexander defeated the Triballians and captured their king, Syrmus.
11. Alexander then turned his attention to the Illyrian rulers, Cleitus, Glaucias, and a prince of the Autariantes, who were in revolt against him.
12. Alexander successfully defeated the Illyrians and secured their submission.
13. Meanwhile, Thebes and Athens, along with other Greek states, were bubbling towards revolt against Alexander.
14. Thebes killed the senior officers of Alexander's garrison and raised the standard of rebellion.
15. Alexander marched on Thebes and demanded that the city hand over two of the uprising's ringleaders.
16. Thebes refused Alexander's demands and Alexander besieged the city.
17. Thebes was brutally sacked by Alexander's army, with 6,000 lives lost and 30,000 more captured.
18. Alexander entrusted the broken city's final fate to his allies, who decided to utterly annihilate the city.
19. News of Thebes' grisly fate reverberated around Greece, prompting the execution of anti-Macedonian demagogues and the calming of revolts.
20. Alexander then turned his attention to Athens, which had remained aloof despite having played a role in the outbreak.
21. Alexander ordered Athens to turn over ten strategoi who had opposed his interests.
22. An Athenian named Demades went to Alexander and managed to persuade the king to forgive and forget.
23. The destruction of Thebes marked a turning point in Alexander's relationship with other Greeks, who hardened into a bitter and implacable hatred towards him.