Sicarii were a group of people a long time ago who lived in a place called Judea. They were very upset because some other people from far away had taken control of their land, and they didn't like it. The sicarii didn't want to just sit around and be unhappy, so they formed a group to fight back.
Now, the sicarii didn't have a very big army, and they weren't very rich, so they had to come up with other ways to fight. They decided to become sneaky and use secret weapons to surprise their enemies. They would sneak up on them, pretend to be friends, and then surprise attack them by pulling out small knives called "sicae" that they had hidden under their clothes. That's where they got their name, "sicarii."
The sicarii also believed in using violence to achieve their goals. They thought it was better to die fighting than to just give up and be unhappy. They were willing to do whatever it takes to get their land back.
But not all people in Judea liked the sicarii. Some thought that violence was not the answer, and that there were better ways to solve their problems. In fact, most people in Judea wanted to live peacefully and didn't want war.
In the end, the sicarii didn't win their war. They were defeated by the other people who had taken control of their land, and their movement slowly faded away. But their story teaches us that sometimes people have to fight for what they believe in, even if it's not easy, and that we always have to be careful not to hurt innocent people in the process.