White Scars - Siege of Terra: Once they had finally reached the Throneworld of the Imperium, the White Scars added a vital tactical and strategic dimension to Rogal Dorn's defence of Terra. Their hit-and-run style of warfare complemented the Imperial Fists' renowned capabilities in holding ground.Meanwhile, Jaghatai Khan's relatively close relationship with Sanguinius would help ensure a strong union between the White Scars and the Blood Angels who had also arrived in time to aid the defence.It is known in Imperial records that much of the White Scars Legion defended the Imperial Palace during the climactic Siege of Terra alongside the Blood Angels and Imperial Fists Legions.Such was the ferocity of the attack by the forces of Chaos that the besiegers forced the Imperial defenders back to the walls of the Imperial Palace, where thousands died slowing the assault.The White Scars brotherhoods' desire and ability to strike hard and fast before slipping away at speed allowed them to harass and frustrate enemy forces and constantly threaten their flanksWhen the beleaguered forces faced a breach in the Palace's walls and a potential collapse of the Imperial defences, Jaghatai decided on a change of plan. Rather than assaulting the almost-invincible flanks of the Chaos army, he redirected his highly mobile ordu and the surviving Loyalist tank divisions of the Imperial Army to the Lion's Gate Spaceport. At dawn, Jaghatai's lightning raid caught the Traitor garrison at the spaceport completely by surprise, and reclaimed the spaceport for the Emperor.The Khan ordered his troops to reactivate the spaceport's Defence Lasers to prevent the Traitor fleet from bringing down any more troops and equipment and form a defensive perimeter to hold their newly reconquered territory. Khan's troops repelled several frenzied counterattacks from the Traitors, and began firing on Horus' unprotected dropships.The Khan's plan worked perfectly: the flow of the Traitors' men and machines to the Imperial Palace had been cut in half at a single stroke. Inspired by this success, the Loyalists also tried to seize the Eternity Wall Spaceport, but were driven back by the Chaos forces without difficulty, as they had reinforced their garrison following the loss of the Lion's Gate.History recorded little else of the Great Khan's actions during the Siege of Terra, but it is known that his Legion ranged the once-proud thoroughfares of Terra during the campaign, engaging the Traitors in punishing hit-and-run strikes. When the end finally came, when Horus died at the hands of the Emperor aboard his Battle Barge Vengeful Spirit in orbit above Mankind's homeworld, the White Scars emerged from the fires of galactic civil war bloodied, but alive.It was said that Jaghatai and his warriors fought many of the Chaos Space Marines that tried to retreat to Terra's spaceports and flee. The White Scars launched several highly-successful hit-and-run assaults against the Traitor forces and together with remnants of the Imperial Army's 1st Terran Tank Division and several infantry regiments they successfully harassed the enemy supply lines as the Chaos armies fled to the Eternity Wall Spaceport to get off-world and escape Imperial vengeance.The White Scars Legion must surely have been at the forefront of the Legions that pursued the defeated Traitors to the Eye of Terror during the Great Scouring, for the White Scars rarely allowed a defeated foe to slip away once their blood was up.