With the assassination of Julius Caesar in 44 BCE, Rome fell into a bitter civil war, but when they came out they would no longer be the republic everyone knew them to be, and history would see the formation of the one day great roman empire.

today on the z files i cover the the build up to the culmination of years of conlift set in motion after the assassination of julius caesar. 

sources: 

Battle of Actium - https://www.ancient.eu/Battle_of_Actium/ 

The Battle of Actium - https://www.history.com/this-day-in-history/the-battle-of-actium 

Battle of Actium - https://www.britannica.com/event/Battle-of-Actium-ancient-Roman-history