What important event did discretion undertake in 294 CE?

In 294 CE, the Roman Emperor Diocletian restructured the Roman Empire's governance by establishing the Tetrarchy, a system that divided power among four rulers. This significant political reform aimed to enhance administrative efficiency and maintain control over the vast empire in response to internal strife and external threats. The Tetrarchy marked a pivotal shift in the way the Roman Empire was managed, laying the groundwork for the eventual transition to the later Roman Empire.