was the emperor who divided the Roman Empire into two parts in order to make it easier to rule.

The emperor who divided the Roman Empire into two parts to make it easier to rule was Emperor Diocletian. Here are the steps he took:

1. Diocletian became Roman Emperor in 284 AD. He recognized that the vast Roman Empire was too large for one person to effectively rule.

2. In 285 AD, he made his first significant move by appointing Maximian as his co-emperor. Diocletian ruled the eastern half of the empire and Maximian ruled the western half. This was the initial division of the Roman Empire.

3. In 293 AD, Diocletian established the Tetrarchy, or "rule of four." He appointed two junior co-emperors (Caesars), Galerius and Constantius Chlorus. Now, there were two Augusti (senior emperors) and two Caesars (junior emperors). Each ruled a quarter of the empire.

4. This division was not only geographical but also administrative. Each emperor was responsible for the administration, defense, and economic stability of his quarter.

5. Diocletian's system was intended to provide a smooth succession, with the Caesars succeeding the Augusti upon their retirement or death. However, this did not work out as planned, leading to power struggles and civil wars after Diocletian's abdication in 305 AD.

6. Despite its problems, Diocletian's division of the Roman Empire into two parts was a significant event. It set the stage for the eventual split into the Western Roman Empire and the Eastern Roman Empire (later known as the Byzantine Empire).