So, a long long time ago, in a place called Persia, there were a group of people called the Romans. The Romans were very brave and strong people who loved to explore and conquer new lands.
When the Romans arrived in Persia, they saw many different things that were new to them, like new foods, new clothes, and even new ways of speaking. They were very curious about these things and wanted to learn as much as they could.
But Persia was ruled by another group of people called the Parthians. The Parthians were not very happy about the Romans being in their land, because they saw them as a threat. They didn't want the Romans to take over their land and their culture.
So, the Romans and the Parthians had many battles and wars. The Romans would try to conquer the land and the Parthians would try to defend it. It was a very intense time, with a lot of fighting and bloodshed.
Eventually, though, the Romans realized that they couldn't defeat the Parthians and decided to make a treaty with them. This treaty allowed the Romans to still explore and trade with Persia, but they could not try to take over the land anymore.
The Romans and the Persians continued to have a relationship, even though they were from different cultures and had different beliefs. They learned from each other and even exchanged goods and ideas.
So, that's the story of the Romans in Persia. They were brave explorers who met a new culture and had battles and wars with them, but eventually learned to get along and exchange ideas.