Introduction
Phobos, "fear" or "panic", is the personification of the terror that grips soldiers in battle, a son of Ares and Aphrodite, generally paired with his twin brother Deimos ("dread" or "terror"), the two together forming a fitting escort for their father, the god of war.
Family
Role
Phobos and Deimos are described, notably in Homer's Iliad, as yoking their father Ares's chariot and accompanying him onto the battlefield, embodying the fear and dread that spread through armies in the chaos of combat, abstract qualities given divine, personal form as constant companions of war itself.
Legacy
The word phobos is the direct root of the modern English suffix "-phobia", used for irrational fears, a linguistic legacy of this ancient personification of battlefield terror. In modern astronomy, Phobos, along with Deimos, is the name given to one of the two small moons of Mars (the Roman equivalent of Ares), named for the god of war's two divine attendants.