The orks are retreating and the Empire has gather the troops for a counter attack close to Equistrus Minoris. The plan is to cut of the ork path of retreat back behind the Equistrus line and trap them in a giant encirclement against the ocean. But to successfully cut them of the bridges over the river Gotha and the North river both has to be captured intact to make it possible for the mechanized troops of the Steel Eagles to reach the coast fast enough. This delicate task has fallen on the Blood Angels and their captain Harianus.
http://agneberguswar.blogspot.se/2014/04/a-bridge-to-far-orks-are-retreatingand.html
