Shadows on the Hordes

Shadows on the Hordes was the name of the Imperial defensive campaign conducted by the Astra Militarum Themes Shadow Regiment against an invading Ork WAAAGH! when they invaded the Segmentum Ultima.

Background
More than half of the Regiment is sent into Segmentum Ultima to cripple some minor but dangerous WAAAGH!. During the campaign one of them counterattack inflicting heavy losses, including the total destruction of 15th Shadow Battalion, but buying enough time to make gather enough imperial forces to crush the greenskin hordes once for all.