Elder sister of first Roman Emperor Augustus, fourth wife of Mark Antony, and great-great-grandmother of Emperor Nero, also known as "Octavia the Younger." Octavia was revered for her humanity, nobility, and depiction of traditional Roman femininity. Octavia helped to secure peace between her brother and husband as they ruled the Roman state. In 36 B.C.E., Mark Antony left for a military excursion in the East, and while gone, he resumed relations with his former wife, Cleopatra VII of Egypt, leaving Octavia to rule their children alone, heartbroken.