Operation Condor was a secret plan by a group of powerful countries in South America in the 1970s and 80s to work together to fight against political enemies. They did this by sharing information and cooperating to capture, torture, and kill people who were considered to be a threat.
Think of it like a group of mean kids on the playground who decide to team up to bully other kids. They all work together to create a plan and pick on someone they don't like.
But instead of kids, these countries were governments and instead of bullying, they were killing people. The countries involved were Argentina, Brazil, Chile, Paraguay, Bolivia, and Uruguay. The plan was named after a species of birds that are known for working together to hunt prey, which is why they called themselves Operation Condor.
The people who were targeted were often those who spoke out against their governments or were thought to be political dissidents. It was a scary time for many people in South America who were afraid to speak up or even be seen talking to the wrong person.
In the end, many people were captured, tortured, and killed as a result of Operation Condor. It is now seen as a dark stain on the history of these countries and a reminder of how powerful people can abuse their authority.