Hi kiddo! Have you ever heard of something called the "Red Terror" in Spain? It's a pretty big and tough topic, but I will try my best to explain it to you in a way that makes sense!
So, first of all, you know that Spain is a country in Europe, right? Well, a long time ago, in the 1930s, there was a big fight that happened in Spain between two groups of people called the Republicans (the reds) and the Nationalists (the blues). The Republicans wanted to make changes to the government so that everyone could have equal rights, but the Nationalists didn't want those changes.
During this fight, there were a lot of really bad things that happened. One of those bad things was called the Red Terror. The Red Terror was when the Republicans tried to get rid of anyone who was against them, even if they were innocent. They did this by killing people or putting them in jail without a fair trial.
The Red Terror was a really scary time for a lot of people in Spain. People didn't know who they could trust, and they were afraid that they might be next to get hurt. It was a very violent and chaotic time.
In the end, the Nationalists won the fight and took over the government. They didn't like the changes that the Republicans wanted to make, so they got rid of those changes and made things go back to the way they were before. This made a lot of people really unhappy, but they couldn't do anything about it because the Nationalists had all the power.
So, that's a little bit about the Red Terror in Spain. It was a very sad and scary time when a lot of bad things happened. I hope that helps you understand a little bit about what happened.