\ Ice and Blood [Aurelia] [Minos Iceworks]

First things first, let's get our squad set up. Deploy Avitus, Cyrus, and Tarkus. Your immediate goal is to push up and protect the allied guardsmen and their frontline HQ. You'll be facing a ton of Heretics, so we need to support our buddies. Activate Tarkus' [TACTICAL ADVANCE] and Cyrus' [STIMULANT KITS] to give your troops a boost. Let the Force Commander go nuts with [BATTLE CRY] and [RIGHTEOUS FURY] – he'll chew through the enemy infantry like nothing. Keep Avitus on [FOCUS FIRE] to suppress the enemy, and have Cyrus use [DEMOLITION CHARGES] to take out those two garrisoned towers.

Next up, we need to secure the area. Capture the nearest Relay Beacon. Then, head northeast to capture the Communications Array. Doing this will stop the Artillery Strikes that are pounding the allied HQ. Keep capturing Relay Beacons as you make your way there, and be ready to fight a summoned Bloodcrusher.

Once the Array is secured, brace yourself. A whole battalion of Chaos Marines is going to come at you from the west. Don't panic! You've got a powerful tool now: the Imperial Guards' [ARTILLERY STRIKES], which you can use again and again. As they march towards you, hit them hard with [BATTLE CRY], [FOCUS FIRE], and [TACTICAL ADVANCE] to soften them up before the artillery finishes the job.

After that engagement, fall back to the ally Guardsmen HQ. We need to help them push towards the enemy Temple and Shrine to Chaos. Having your extra troops join the fight will make pushing the frontline much easier. Remember, your buffs like [BATTLE CRY] and [TACTICAL ADVANCE] will also benefit the allied Guardsmen, making them even more effective.

Your next objective is to secure the Power Station Shield Terminal. You might run into three enemy Dreadnaughts on the way. Don't sweat it too much; a well-placed [MELTA-BOMB] followed by a quick Force Commander melee can take them down fast. The regular enemy infantry are just a nuisance at this point – lots of them, but not a serious threat damage-wise.

Finally, it's time to destroy the Chaos Temple. It has 80520 HP, so it's a bit of a slog. Be careful, though, because it'll spawn Bloodletters and Bloodcrushers as you attack it. Keep the ally Guardsmen providing fire support, and have Cyrus lob [DEMOLITION CHARGES] at any enemy structures that pop up.