Okay kiddo, let me tell you about laeti. Laeti were a group of people who lived a long, long time ago. They were like soldiers who joined the Roman army but were not actually Roman citizens.
They came from places that were conquered by the Romans and they were promised land and money, in exchange for joining the army. These were things that they did not have before, so it was a big deal for them to join.
Laeti were not always treated very nicely by the Roman soldiers or citizens. They were often looked down upon and treated as second-class citizens because they were not from Rome.
But many laeti were able to make a good life for themselves in the Roman army. They were able to learn new things, travel to new places, and protect the empire. Some even became Roman citizens and were able to own land and have families.
So, laeti were a group of people who joined the Roman army in exchange for land and money, but they were not Roman citizens. They were often treated poorly by Romans, but many were able to create a good life for themselves in the army.