Today for the GW Advent Calendar its a Astra Militarum Mission that ties into the short story written by Justin D Hill from the Black Library.
You can see the schedule for the Advent Calendar by following the link.
http://natfka.blogspot.com/2014/12/gw-advent-calendar-fully-revealed.html
Today's Advent Calendar Releases
ECHOES OF WAR: ASTRA MILITARUM - LAST STEP BACKWARDS (EBOOK) $ 4.99
For Cadia, and the Emperor!
As the Chaos hordes of Luciver Anckor bear down upon the last settlement of Besana, only a thin line of Cadian Whiteshields bars their path. Led by the courageous Major Luka and supported by a single, battered Leman Russ, these heroic Cadians must hold out at all costs until reinforcements arrive.
Black Library tie-in mission
To accompany the Black Library short story 'Last Step Backwards', this Warhammer 40,000 Echoes of War mission allows you to refight the courageous stand of the Cadian Whiteshields against Chaos forces on the Incardine Ridge.
LAST STEP BACKWARDS (EBOOK) $ 4.99
THE STORY
As the dread forces of the Chaos-worshipping Anckorites spread from world to world, Cadian Shock Troop Whiteshields – new troopers tasting battle for the first time – are all that stand between the enemy and utter destruction. But when the famed general Ursakar E Creed enacts a dangerous battle plan to out man-oeuvre the foe, there may just be hope for survival, or even victory.
READ IT BECAUSE
The first Black Library story to feature the famed Cadian hero Ursakar E. Creed. See him in action doing what he does best – outwitting the foul forces of Chaos with tactical cunning and Cadian determination.