Southern Sector and Ultramar's Heroes!

By the time Rorschach had passed through layer upon layer of ship corridors and reached the flagship's lower decks.

He had learned from Fulgrim, who was surrounded by several Tech Sergeants, that Mortarion had secretly appeared.

Rorschach first consoled the impassive Fulgrim.

Out of the bond between Primarch Brothers, he also fiercely condemned Mortarion's disgraceful behavior of going astray.

Fulgrim, seated nearby, fell silent for a moment.

Then, with a solemn expression, he spoke to Rorschach in a deep voice.

If he had previously supported Rorschach's expedition plan purely because of a Primarch's duty and The Emperor's decree.

Then now, he and Mortarion had formed a personal grudge that could never be resolved.

No matter how the battlefield situation developed in the future, the two of them were destined to fight!

Rorschach also expressed his agreement.

Since they had successfully captured Perturabo, they ought to prepare for a reunion between brothers as well.

Over the following period, in order to reduce Astartes casualties.

Rorschach began ordering the commanders within the Primarch fleet that, when confronting Chaos Ships.

They no longer needed to conduct Boarding Actions according to convention, but could instead use overwhelming long-range firepower to annihilate enemy fleets far smaller than their own.

This both reduced Mortarion's opportunities to strike in secret and greatly increased the Primarch fleet's travel speed.

Several months later, Rorschach's Primarch fleet successfully arrived in Ultramar's southern sector.

After the fleet swiftly annihilated several small Death Guard fleets.

Capital World Andermang, the capital world of the southern sector, was already within reach.

BOOM! BOOM! BOOM!

One enormous metal warship after another slowly docked around Capital World Andermang's low orbit.

Numerous activated orbital defense platforms became temporary starports, beginning to replenish the Primarch fleet with vast quantities of supplies.

Rorschach and Fulgrim boarded a Thunderhawk Gunship