Okay kiddo, so there were some people in Greece a few years ago who didn't feel safe in their homes anymore. They had to leave because there was a big war going on and it was too dangerous for them to stay.
These people became what we call refugees. A refugee is someone who has to leave their home because of something really scary, like a war or a big natural disaster.
So these Greek refugees had to leave their homes and go to other countries to be safe. This was really hard for them because they had to leave behind everything they knew and loved.
Some countries were very nice and let the refugees come live there. They helped them find new homes and gave them food and clothes. But other countries didn't want the refugees to come to their country, which made everything really complicated for the refugees.
The Greek refugees had a really tough time, but they were very strong and brave. They had to start their lives over in a new place, but they never gave up hope that things would get better.