ELI5: Explain Like I'm 5

Barbarian invasions

Okay kiddo, so imagine you live in a big castle with your family and lots of people like your parents who work there. But one day, some strange and scary-looking people from a faraway land called the Barbarians come to your castle.

These Barbarians want to take over your castle and make it their own. They are very different from you and your family. They don't wear nice clothes and don't always shave or brush their teeth. But most importantly, they don't obey the same rules and laws as you do.

Your parents and other grown-ups in the castle know that they can't let the Barbarians take over, so they fight them off and keep them out. But it's not easy. Sometimes, the Barbarians have lots of weapons or horses that make them hard to beat.

Many castles in different parts of the world had to deal with Barbarian invasions a long time ago. Even though the Barbarians were not always bad people, they wanted to take over things that they didn't belong to them. Eventually, some of the Barbarians became friends with the people in the castles and they learned to live together. But it was a scary time for those who experienced it.