Alexander the Great was a king of Macedonia who lived from 356 BC to 323 BC. He is widely regarded as one of the greatest military leaders and conquerors in history. He succeeded his father, King Philip II, to the throne at the age of 20 and went on to create one of the largest empires in the ancient world, stretching from Greece to Egypt and as far east as India. Alexander is also known for spreading Greek culture and ideas throughout his empire, a period known as the Hellenistic Age. His military tactics and strategies are still studied and admired today, and his legacy has had a lasting impact on the world.