In Red Arrow, Black Shield, the Desert Nomads are invading Akesoli, and plan to invade Darokin next, and the player characters must organize a defense. This scenario combined role-playing and wargaming to resolve a strategic battle, using rules from both the Companion Set and Battlesystem.
The player characters lead diplomatic missions and armies against the Desert Nomads and their evil leader, The Master. With the Nomadic invasion of Akesoli, the Republic of Darokin prepares for war.
This module is billed as "A BATTLESYSTEM(TM) Game/War Machine Spectacular!" It uses the mass combat "War Machine" rules from the Companion Set, and the BATTLESYSTEM Fantasy Combat Supplement included with the module, as well as a large map of Mystara and strategy game tokens. There are a number of "Chase Flow Charts" used to direct encounters through an abstracted landcape as players pursue others or are pursued themselves through the streets.
X10 Red Arrow, Black Shield was written by Michael S. Dobson, with a cover by Jeff Easley, and was published by TSR in 1985 as a 48-page book, large color map, cardboard counter sheet, small zip-locked bag, and an outer folder.