Macedon is a place that used to exist a long time ago, kind of like a big country. It was in a part of the world called Ancient Greece, where people lived differently than we do now.
Macedon had a really famous king named Alexander the Great. He was really good at leading his people in battles and making their country stronger. He wanted to conquer other places as well, so he and his soldiers went on a big journey to take over other parts of the world.
Eventually, Alexander the Great died and the people who lived in Macedon had to figure out how to rule their country without him. This was really hard because they didn't have such a strong leader anymore. Over time, Macedon became a part of other countries and isn't its own separate place anymore. But people still remember it as an important part of history.