30 BC · Alexandria, Egypt
Octavian's legions took Alexandria after Actium; Antony and Cleopatra died and Ptolemaic Egypt fell to Rome.
Actium in 31 BC did not end the war, it only decided it. Antony and Cleopatra escaped to Egypt with what was left of the fleet, and Octavian took a year to settle Italy and his legions before following them.
Egypt was the last Hellenistic kingdom and the richest prize in the Mediterranean. Its grain alone was reason enough for Rome to want it directly.
Octavian advanced on Alexandria in the summer of 30 BC. Antony won a small cavalry action outside the city, but the following day his remaining fleet and cavalry went over to Octavian without fighting, and the infantry followed.
There was no real battle for Alexandria. Antony took his own life on a false report that Cleopatra was dead; Cleopatra, held under guard and facing a triumph in Rome, killed herself days later.
Egypt became a Roman province, held as the personal domain of the emperor. Three centuries of Ptolemaic rule ended, and with them the last of the kingdoms Alexander's generals had carved out. Octavian became Augustus four years later.
The scenario is the fall of a position that cannot be held rather than an even contest: Egypt's problem is that its strength keeps leaving, Rome's is to press before anything can be rebuilt.
The sides, the commanders and the ending are historical. Because the historical battle was largely a collapse, the playable version is the game's invention: it gives Egypt a fight the real defence never had.