Ok kiddo, so back in ancient times, there was a place called Han and another place called Nanyue. They were both in what we call China today. The people who lived in these places spoke different languages and had different cultures.
Now one day, the leaders of Han wanted to take over Nanyue. They thought their army was really strong and that they could easily defeat Nanyue's army. But Nanyue's leader, whose name was Zhao Tuo, was no slouch either. He had a plan to defend his people and his land.
When the armies of Han and Nanyue finally met, a big fight broke out. They used swords, spears, and other weapons to try and defeat each other. But the battle was really tough, and lots of people got hurt.
In the end, Nanyue won the war, and Han had to give up their plan to take over. But both sides realized that fighting was not the best way to get along, so they decided to make peace. They traded goods and other things, and their people started to learn from each other.
So, that's the story of the Han-Nanyue War, and how even when people fight, they can still come together and make peace.