Hey there kiddo! So, imagine you have a toy that you really love playing with. But one day, someone else comes along and takes away a part of your toy that you really like. You might feel sad and upset, right?
Well, a long time ago, there were some people called the Saxons who lived in a place called Saxony. But another group of people called the Franks wanted to take control of Saxony and make it part of their own land. So the Franks and the Saxons had a meeting, and they made a deal called the Capitulatio de Partibus Saxoniae (which is just a fancy name for an agreement).
Now, this agreement said that the Saxons could keep their own laws and customs, but they had to follow the Frankish king as their leader. They also had to convert to Christianity (which was the religion of the Franks) and give up their old religious practices. It was kind of like the Franks taking away a part of the Saxons' identity, just like if someone took away a part of your favorite toy.
Some Saxons agreed to the deal and became loyal to the Frankish king, while others didn't like it and rebelled against the Franks. Eventually, the Franks were able to conquer Saxony and make it part of their own kingdom. But even though things didn't work out the way the Saxons wanted, they still have a rich history and culture that they're proud of today.