House Chimaeros - Notable Campaigns: Horus Heresy (Unknown Date.M31) - While the Imperium of Man tore itself asunder in the great interstellar civil war known as the Horus Heresy, Adrastapol had prospered under the aegis of High King Rhoderic Tan Chimaeros. But the taint of Chaos had also taken root on Adrastapol as both House Hydrax and House Medusos openly declared for the Traitor Warmaster, Horus Lupercal, and waged a war of conquest that took a heavy toll on the remaining Knight Houses. As the heart of the alliance forged by High King Rhoderic, House Chimaeros confronted and ultimately vanquished these Renegade Knights with the support of the other Houses.Ork Wars (Unknown Date) - When the Ork Warboss Skarjaw led his WAAAGH! to the Knight World of Adrastapol, the Knights were slow to react. Before their full strength could be gathered several keeps of House Manticos were destroyed and burnt to the ground, leaving the House severely depleted. Knowing that the enemy was too powerful for them to defeat on their own, House Chimaeros called for a coalition of all the remaining households, an alliance unseen since the distant days of the Horus Heresy. Belonging to one of the most savage and feral tribes of his race, Skarjaw and his Orks rode to battle on towering Squiggoths. These great beasts can easily pose a threat to Imperial Knights, a fact the defenders of Adrastapol soon became painfully aware of. Engaged at full strength against the Orks, House Chimaeros did not anticipate Skarjaw's next move, which consisted of attacking the Draconspire, the mighty fortress of House Draconis after breaking the Adrastapolian lines. Fortunately for the defenders of the Knight World, the Gatekeeper of the Draconspire, Tolwyn Tan Draconis, acted upon his instincts and led a decisive counterattack on Skarjaw himself who had become separated from the main contingent of Orks. With Skarjaw slain, the cohesion of his WAAAGH! was broken and the fractured Greenskins were targetted by the coordinated and unified Imperial Knights. It was due to this great feat of arms that a firm friendship was formed between Gatekeeper Tolwyn Tan Draconis and High King Gerraint Tan Chimaeros. However, the survivors of this invasion soon turned feral and scattered. In the years that followed, the Knights of Adrastapol mercilessly hunted down the remaining Orks and Squiggoths until their homeworld was declared purged from the xenos filth which had befallen it. It was also during this time that the High King encountered and saved Alicia Kar Manticos in the ruins of her home, the event that ultimately sealed House Chimaeros' fate.Galhorm Crusade (Unknown Date.M41) - Very little is known about this obscure Imperial Crusade save that it was a costly battle for the Imperial troops involved and especially so for the Knights of Adrastapol. Following the death of the Kingsward, Gedric Tan Chimaeros, the crown of the High Kings of Adrastapol passed on to House Draconis.Donatosian Uprising (Unknown Date.M41) - Also referred to as the Donatos War, the Donatosian Uprising marked the Imperial assault upon the rebellious Industrial World of Donatos Primus. Through the laxity of its rulers, previously undetected Chaos Cults had been allowed to grow strong until their presence invited the direct involvement of their tenebrous masters -- a Word Bearers warband under the control of the Dark Apostle Varakh'Lorr. The cultists succeeded in overthrowing the Imperial planetary government and killing the Planetary Governor as well as corrupting large portions of the Donatosian Planetary Defence Forces. However, the enemy's victory was not complete: Loyalist PDF troops and the world's contingent of the Adeptus Arbites still held out against the enemy and were able to issue a call for aid. The Imperium acted with uncustomary swiftness, despatching a sizeable army of Astra Militarum regiments under the general command of High King Tolwyn Tan Draconis and his Imperial Knights. Having secured a beachhead, the men and women of the Cadian Shock Troops, Tanhollis Highlanders and Mubraxis Dustdogs pushed back the insurgents. Both sides knew that control of the Adamant Citadels, an extensive network of powerful fortifications, would bring victory on Donatos Primus and it was with this goal in mind that High King Tolwyn prosecuted his war. As the Loyalist Imperial Knights of House Draconis, House Minotos and House Pegasson charged the enemy, House Chimaeros and House Wyvorn chose to turn Renegade at that moment and opened fire on their former allies. With the death of High King Tolwyn during this carefully planned ambush, Viscount Gerraint Tan Chimaeros proclaimed himself the new High King of Adrastapol with the backing of Archduke Dunkan Tan Wyvorn whilst Tolwyn's son and heir was proclaimed counter-king to Gerraint's claim. For a small time, Renegade Knights, Chaos Cultists and the Word Bearers Heretic Astartes were able to unite their forces against the Imperial troops, but ultimately Gerraint Tan Chimaeros knew he could not trust his allies of the Word Bearers. Using his superior numbers and the scattered deployment of the Traitor militia and PDF regiments, House Chimaeros betrayed the Word Bearer Dark Apostle, assuming control and leadership over vast portions of the Chaos army. At the same time, Alicia Kar Manticos lured the still insecure High King Danial into a second ambush during which she slew the leader of House Minotos but failed to kill Danial Tan Draconis. However, Varakh'Lorr held on to power and the control of the Adamant Citadels. Forced to fight on both fronts, House Chimaeros did not succeed in defeating the vengeful troops under High King Danial. Viscount Gerraint was slain in personal combat by Tolwyn's daughter, Jennika Tan Draconis, and the surviving Renegade Knights were mercilessly hunted down.