Although Ares was viewed primarily as a destructive and destabilizing force, Mars represented military power as a way to secure peace, and was a father (pater) of the Roman people. In the mythic genealogy and founding myths of Rome, Mars was the father of Romulus and Remus with Rhea Silvia. His love affair with Venus symbolically reconciled the two different traditions of Rome's founding; Venus was the divine mother of the hero Aeneas, celebrated as the Trojan refugee who "founded" Rome several generations before Romulus laid out the city walls.
The importance of Mars in establishing religious and cultural identity within the Roman Empire is indicated by the vast number of inscriptions identifying him with a local deity, particularly in the Western provinces.
Like Ares who was the son of Zeus and Hera, Mars is usually considered to be the son of Jupiter and Juno. However, in a version of his birth given by Ovid, he was the son of Juno alone. Jupiter had usurped the mother's function when he gave birth to Minerva directly from his forehead (or mind); to restore the balance, Juno sought the advice of the goddess Flora on how to do the same. Flora obtained a magic flower (Latin flos, plural flores, a masculine word) and tested it on a heifer who became fecund at once. She then plucked a flower ritually using her thumb, touched Juno's belly, and impregnated her. Juno withdrew to Thrace and the shore of Marmara for the birth.
Ovid tells this story in the Fasti, his long-form poetic work on the Roman calendar. It may explain why the Matronalia, a festival celebrated by married women in honor of Juno as a goddess of childbirth, occurred on the first day of Mars' month, which is also marked on a calendar from late antiquity as the birthday of Mars. In the earliest Roman calendar, March was the first month, and the god would have been born with the new year. Ovid is the only source for the story. He may be presenting a literary myth of his own invention, or an otherwise unknown archaic Italic tradition; either way, in choosing to include the story, he emphasizes that Mars was connected to plant life and was not alienated from female nurture.