The Roman-Persian wars were like big fights between two groups of people who lived far away from each other a very long time ago. The Romans were people who lived in a place called Italy and the Persians were people who lived in a place called Persia. The fights happened because both groups wanted the same things like land, resources, and to be in charge.
The wars started a long, long time ago when the Persians were ruled by a king named Cyrus the Great. He wanted to make his empire bigger and stronger, so he started to fight with the Romans who had a big and powerful empire too. They fought many times over many years, back and forth, winning and losing battles.
Sometimes the Romans won and sometimes the Persians won. They used swords, arrows, and horses to fight. In one famous battle, the Persians used elephants to scare the Roman soldiers. It was a very tough fight and many people were hurt or killed.
The wars continued for more than 700 years, which is a really long time. Sometimes they would stop fighting for a while and make agreements, but then they would start fighting again later. The wars finally ended when both empires were too weak and tired to keep going.
Today, people remember the Roman-Persian wars as an important part of history because they were wars between two big and powerful civilizations that lasted for a very long time.