Okay, so on May 13th, 1969 there was a big fight in Malaysia. The people who lived in Malaysia were from different groups, and some of them didn't like each other very much. They were fighting over who should have more power.
The fight got really big and turned into a riot. This means lots of people were fighting and breaking things and it was really scary. The police had to come and try to stop the fight, but they had a hard time because there were so many people involved.
The fight lasted for a few days and lots of people got hurt. After it was over, the government took control and made some big changes to try to keep this from happening again. They made rules about how people should treat each other and tried to make everyone feel respected and treated fairly.
Even though it was a scary time, people learned from it and tried to make things better so that everyone could live in peace and harmony.