Macedonia was a really old kingdom a long, long time ago. This kingdom had a government, which was like a group of people who made decisions for all of the people who lived in Macedonia.
The guy in charge of the government was called the king. He was the most important person in Macedonia and his job was to make sure everyone was happy and safe.
The king had lots of helpers too. They were called nobles and they were rich and powerful people who helped the king make decisions. They were in charge of different parts of Macedonia, like the army or the money or the food.
The people who lived in Macedonia didn't get to have a say in the government. They just had to do what the king and the nobles told them to do. If they didn't do what they were told, they might get punished.
Overall, the government of Ancient Macedonia was like a big group of people who tried to make life better for everyone.