1. The alternate history starts in 31 BC. The Battle of Actium results in a major victory for Mark Antony when a storm destroys most of Octavian's fleet before the battle. Mark Antony's soldiers receive much-needed supplies and are able to break through Octavian's fortifications one month later, destroying his army in a costly battle.
This results in a cease-fire between Mark Antony and Octavian, and the subsequent permanent division of the empire. A major revolt takes place in Numidia Superior, which soon spreads to Numidia Inferior, Africa, and Mauretania. The revolting territory was defended from attack by Octavian when Mark Antony used his large navy to, yet again, destroy the Roman navy and stop them from landing troops in Africa.
The Roman army in the north is heavily damaged by the battle of Teutoberger Forest. A major revolt is started in North Gallia/Belgica by the governor of Belgica, which with the help of the descendents of the Gauls defeated 50 years earlier, spreads to much of northern Gaul.
And Judea is able to defeat the local Roman leadership and form the new country of Judea.
The NES would start in 20 AD, and would focus on Europe, the Middle East/Western Asia, and North Africa.