11. This is partly because after Actium , the reign of Augustus was mostly peaceful. 12. It was probably founded as a colony by Caesar Augustus after his victory at Actium . 13. In this function he participated in the last fights before the decisive Battle of Actium . 14. They served with Mark Antony between 41 BC and 31 BC and probably fought in Actium . 15. Mark Antony stopped there before Actium . 16. In 1813, he discovered in Actium a stone slab with Acarnanian inscriptions which he deciphered. 17. At nearby Actium , Mark Antony and Cleopatra were defeated in a sea battle by Octavius. 18. Later that year, Antony was defeated by Octavian's forces at the Battle of Actium . 19. He fought alongside Octavian in the battle of Actium in 31 BC . They became longtime friends. 20. They were defeated at the Battle of Actium in 31 BC . They went back to Egypt.