Okay kiddo, so a long time ago in a place called the Borders between England and Scotland, there were these people called the Border Reivers. They were kind of like cowboys or outlaws.
You see, back then there was a lot of fighting and raiding going on between the English and the Scottish. The Border Reivers were sort of in the middle of all that. They were families who lived along the border and made a living by raiding each other's farms and stealing sheep, cattle, and crops.
It might seem like a bad thing to do, but for these families it was just a way to survive. They didn't have a lot of money or resources, so they had to do what they could to support themselves. But of course, it wasn't really fair to the people who were being raided!
The Border Reivers were known for being really good horsemen and fighters. They had their own code of honor and rules about how to behave during raids. Sometimes they would work together, and sometimes they would fight against each other.
Eventually, the border between England and Scotland became more peaceful and the government started cracking down on the Border Reivers. But they still have a reputation as powerful and tough fighters, and their history is an important part of the story of the English-Scottish borderlands.