The Vanguard is a medium-sized frigate for escort and patrol duties. While mainly designed as an anti-fighter/bomber support vessel a small number of heavier weapon emplacements allow it to hold its own against smaller capital ships as well.

Constructed by KDY in collaboration with Mithary Capital Yards the Vanguard was commissioned by the ESS for doployment within wild and/or unsecured sectors to serve as both protection for trade convoys as well as long range patrols and peacekeeping, especially around 2550, when ESS borders were frequently probed by over-ambitious ex-imperial warlords hoping for a quick grab. With attacks increasing along the ESS borders, high command decided to deploy the frigates in groups of 2 to 3 to be able to cover each other, in some critical sectors even led by a Cruiser.

Along with its crew of roughly 1,100 the Vanguard can carry a complement of 340 troops, however, those are mainly meant for internal security, as the ship's small hangar bay, does not allow large scale deployment at short notice.