Okay kiddo, let's talk about Pausanias the general. Pausanias was a man who lived a long, long time ago in ancient Greece. He was a really important guy because he was a general in the Greek army, which means he was in charge of a whole lot of soldiers.
Now, Pausanias did some pretty cool things in his life. He was part of a famous battle where the Greeks fought against the Persians (who were from a place called Iran). This battle was called the Battle of Plataea and it was a really big deal because the Greeks won and it helped them gain more power in their part of the world.
But, as happens with some important people, Pausanias started to get a big head. He thought he was better than everyone else and he started acting really selfishly. He even started working with the Persians, who the Greeks had just fought against, to try and gain more power for himself.
This made a lot of people really angry with Pausanias, and they decided to do something about it. They put him in jail and he eventually died there. So even though Pausanias was once a powerful and important person, he ended up doing some bad things and it caught up with him in the end.
In summary, Pausanias was a Greek general who fought and won a famous battle against the Persians, but then became greedy and selfish, ending up in jail where he died.