From Halopedia, the Halo wiki
The Ares missile is a series of ship-to-ship missiles carried by Colonial Military Authority warships, intended for engaging enemy ships in space combat. The transfer of CMA military assets into the control of the United Nations Space Command would see it used by the UNSC, though seemingly eventually retired.
Unlike its successors, whose pods carry thirty or more missiles, an Ares silo carried only a single missile. Warships historically carried far fewer Ares missiles than Archer missiles. Ares missiles were typically mounted on the ships of the CMA Navy while the UNSC Navy preferred Archers.
M44 Ares missiles were employed during the Insurrection conflict during the 25th century. The Scholte-class missile corvette was designed by the CMA to carry two such missile pods, alongside a complement of M58 Archer missiles.
List of appearances