Phobos & Deimos
Φόβος, Δεῖμος
The two sons who drive the chariot of Ares.
Phobos is fear; Deimos is the terror that breaks an army.
The point of this lineage: what the god of war carries with him is not weapons, but these two emotions.
The two moons of Mars bear their names — fitting company, the naming goes, for the planet of war.
SourcesHesiod, Theogony