Citera

The Battle of Tyrok Fields marked the beginning of Abaddon the Despoiler's 13th Black Crusade, at the Tyrok Fields on the Imperial Fortress World of Cadia in 999.M41. The battle was an attempt by Abaddon to begin his conquest of the Cadian Gate by killing the entire high command of Cadia in one fell swoop through treachery.
The battle began when the Volscani Cataphracts, a regiment of the Imperial Guard who had been thought to be loyal soldiers of the Imperium but had instead secretly thrown their lot in with Abaddon and the Forces of Chaos, broke ranks during a great military parade and began the wanton slaughter of several hundred nearby Imperial Guardsmen.
The true extent of their treachery was discovered when they exchanged their Cadian and Imperial banners for those of Chaos, after which the Volscani forces fired from their Leviathan super-heavy transports onto the unsuspecting Cadian delegation. The Volscani troops, now barbaric followers of Chaos, poured onto the landing fields and attacked the shocked Cadians, pouring onto them with the savagery and brutality the Volscani had gained a reputation for. The Volscani stormed the Lord Castellan (Planetary Governor) Marus Porelska of Cadia's Leviathan, and killed him and much of the Cadian military High Command. Porelska had been on-site to receive a massed salute from all the assembled Imperial Guard soldiers before they went off to defend the Cadian Gate from Abaddon's expected attack.
With no leadership the Cadians were being slaughtered by their renegade counterparts.
Colonel Ursarkar E. Creed, present at Tyrok with his 8th Cadian Regiment of the Imperial Guard, rallied the forces under his command and immediately counter-attacked the Traitor Guardsmen. The 8th Cadian spearheaded an advance of several Imperial Guard regiments, with the 7th Cadian Regiment at its side the entire time.
The attack left no doubt that Abaddon the Despoiler was going to launch his 13th Black Crusade against Cadia. It also saw the promotion of Colonel Ursarkar E. Creed to Lord Castellan of all of Cadia
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1st Battle: Retreat Into The Cities (ADSector)
2nd Battle: Urban Hellscape (Renegade Assault ADSector Sequential)
3rd Battle: Assassination of General Klief of the Volscani Cataphracts by the Kasrkin and Leman Russ tanks (Assassination)
4th Battle: Detonating Landing Pads (Terminals 3, Cadian Shock Troopers blow up 3 Landing Pads)