Fasci Siciliani is a really big word that refers to a group of people who lived in Sicily a long, long time ago. These people were known for wanting to change things in their country because they thought the government wasn't doing a good job of taking care of them and others like them.
Imagine you're playing with your friends and you notice that one of your friends isn't getting treated very well. You might decide to say something to your other friends and try to get them to help you stand up for your friend. This is kind of like what the Fasci Siciliani group was doing, but on a much bigger scale.
The Fasci Siciliani wanted the government to create laws to help poor people and give them more rights. They wanted things like better wages, better living conditions and better working hours. They also wanted to try and stop people who were really rich from taking advantage of people who were poor.
But the government wasn't too happy about this group of people trying to change things. They thought these changes would cost too much money and they liked things the way they were. So they tried to stop the Fasci Siciliani by using violence and force.
Eventually, the group disbanded, but they did leave a lasting impact. The things they wanted, like better rights and treatment for everyone, have continued to be important goals for people fighting for fairness and justice today.