Okay, so let's pretend that you and your friends have a big group project to do, and you all have to work together to get a good grade. But one of your friends, let's call them the "leader," wants to make all the decisions and won't listen to anyone else. This makes everyone else very unhappy, and they start to argue and fight with the leader.
Now let's say this is what happened in Eastern Europe a long time ago, but instead of a school project, it was the government running the whole country. The leader was called the "Communist Party," and they had all the power. They made all the decisions and didn't let anyone else have a say. Some people didn't like this, and they wanted to change things.
So they formed what we call "insurgencies," which are groups of people who try to fight against the government to make things better. These people had different ideas about what they wanted to change and how to do it, but they all agreed that they didn't like the Communist Party and wanted it gone.
But fighting the government is really hard, especially when the government has a lot of weapons and resources. So these insurgencies had to be very sneaky and careful. They would hide in secret places, like forests or caves, and come out only when they needed to attack. They would sabotage Communist Party operations, like blowing up factories or cutting communication lines. And they would try to recruit more people to join them, so they could be stronger.
The Communist Party didn't like this at all, and they tried to stop the insurgencies by force. They sent soldiers and police to catch and kill insurgents, and they would torture and imprison anyone they thought was helping them. It was very dangerous to be part of an insurgency, but some people were willing to risk everything because they believed in their cause.
In the end, the insurgencies were successful in many Eastern European countries. They fought for years and years, and finally, the Communist Party lost its power. The countries became more democratic, which means that everyone has a say in how things are run. This was a big change for the better, and it wouldn't have happened without the efforts of the anti-communist insurgencies.