So, a long, long time ago before we had computers or phones, there were different groups of people living all over the world. Some of those people lived in a place called Amarna in Egypt.
Now, these people didn't have phones or email, but they still needed to communicate with each other. So, they wrote letters to each other on pieces of clay.
These letters were called Amarna letters because they were found in the city of Amarna in Egypt many years later.
The letters talked about things like trading goods and how different groups of people were treating each other.
But, because there were so many different groups of people living in Amarna, they needed to know who was in charge of each group.
So, each letter had the name of the person in charge of the group it was being sent to.
This person was called a ruler, kind of like a king. They were in charge of making sure things ran smoothly in their group and that their people were safe.
So, the Amarna letters talked about different groups of people and their rulers. They helped these groups communicate and work together to make sure everyone was taken care of.