The empire known for its conquests across Europe, including Greece and Persia, is the Macedonian Empire, led by Alexander the Great. Alexander, who became king in 336 BCE, expanded his empire through a series of military campaigns that resulted in decisive victories against powerful adversaries like the Persian Empire. His conquests spread Greek culture, language, and ideas across vast territories, creating the Hellenistic period characterized by cultural syncretism. Alexander's empire stretched from Greece through Asia Minor, Egypt, and into parts of India before his untimely death in 323 BCE, leaving a lasting legacy in world history.