The National Liberation Army, or ELN for short, is a group of people in Colombia who want to change the way things are in their country. They believe that the government and rich people are not treating everyone fairly, and they want to fight for more rights and opportunities for everyone.
The ELN uses guns and other weapons to try to get their message across, which is not something that is okay for regular people to do. It can be very dangerous to try to solve problems with violence, and many people have been hurt or killed because of it.
The government of Colombia does not agree with the ELN, and they are working to stop them from causing more harm. They are trying to find a way for everyone to work together peacefully and make things better for everyone.
It's important to remember that while the ELN might believe they are fighting for a good cause, using violence is never the right way to solve problems. It's much better to talk about the issues and work together to come up with solutions that everyone can be happy with.