Okay kiddo, so the Battle of Valverde happened a really long time ago in the year 1385. It was a very important battle that happened in Portugal.
Basically, there were two groups of people who wanted to be in charge of Portugal. One group was led by a man named John, who was from Portugal. The other group was led by a man named John of Castile, who was from a neighboring country called Castile.
John of Castile wanted to take over Portugal, so he gathered up his soldiers and marched towards Portugal. John, from Portugal, didn't want that to happen, so he also got his soldiers ready for a fight.
The two groups met at a place called Valverde. They fought each other with swords, shields, and other weapons. It was a very scary and dangerous battle!
In the end, the group from Portugal, led by John, ended up winning the battle. They were able to keep control of their country, and John of Castile had to go back to his own country.
The Battle of Valverde was a big deal because it helped determine who would rule Portugal. It was a very important moment in their history, and people still remember it today!