Valentinian II

Valentinian II was a Roman emperor, which is like being a king of a super-duper big country called the Roman Empire. But here's the amazing part: he became emperor when he was only four years old! That's younger than most kids start kindergarten.

He was the youngest emperor ever in the Western Roman Empire. His dad was Emperor Valentinian I, and his mom was Empress Justina. When his dad passed away, the soldiers decided Valentinian II would be the new leader, even though he was just a little kid.

Valentinian II didn't rule all by himself at first. He had a big brother named Gratian who was also an emperor. They shared the job of leading the Western Roman Empire. Think of it like having two captains for a giant ship. Meanwhile, other parts of the Roman Empire were ruled by his uncle Valens and then by another leader named Theodosius I. It was a busy time with lots of people in charge!

Sometimes, people tried to take over the emperor's job. One person, named Magnus Maximus, was a 'usurper' – that means he tried to steal the throne! He even fought Gratian.

Later, Maximus invaded Italy, where Valentinian II and his family lived. They had to pack up quickly and escape to a city called Thessalonica. It was like a super-fast family road trip to find help from Theodosius I, who then helped Valentinian II get his throne back.

After getting his throne back, Valentinian II was still in charge, but a powerful general named Arbogast was like his boss. Arbogast made most of the big decisions. Sadly, when Valentinian II was only 21 years old, he was found dead in his palace.

Some people thought he might have ended his own life, while others believed Arbogast might have been involved because Valentinian II wanted to be the real boss. It's a mysterious and sad end to a very young emperor's story.