Donatos War - March on the Valle Electrum: From the bottleneck of the Pentakhost Peninsula, the army of High King Tolwyn pressed northwards. Despite the nature of the terrain -- which was highly urbanised -- the army made good progress, advancing mainly along the great macro-highways linking together Donatos' great concentrations of industry. While the Imperial Knights kept to the main arteries, the bloody business of clearing out hab blocks and manufactoria fell to the men and women of the 454th Cadian, experts in street-fighting. They faced only Chaos Cultists and Renegade PDF, and the Imperial Knights' firepower made short work of them. Yet the enemy refused to let the Imperial forces advance unhindered. On bridges and other chokepoints, the Heretics used groundcars and macrohawlers to erect barricades against the advancing army, but even equipped with more heavy weapons and supported by elements of the Planetary Defence Forces' armoured brigades, these rebels were no match for the Imperial troops.Over the following solar days and weeks the Imperial forces conquered several key districts: the Magna Destros Manufactorii, the Imperatos Magnificat, the Diocese Promethean and Totalum Hespraxii all fell back into Imperial hands. On several occasions, the Traitors gathered in sufficient numbers to warrant a true battle, but still no Chaos Space Marines were sighted. At each one of these true battles, High King Tolwyn Tan Draconis personally led the charge in his modified Knight Paladin, Fyreheart. Less than a solar month after their initial landing, the Loyalists were in striking distance of their designated target: the Valle Electrum.For the second time, High King Tolwyn convened his closest allies for a war council where he presented his plan for the coming attack. With the enemy firmly entrenched behind the formidable defences of the Valle Electrum, even the might of the Imperial Knights was not enough to break through. The target would need softening up before High King Tolwyn's Knights could charge through and take the breach.Being the best equipped for the task, the Mubraxian regiments and the Tanhollis Highlanders would open hostilities with a heavy artillery barrage. This attack would be supported by several runs of the Imperial Navy's bomber wings. Once the outlying defences were sufficiently weakened, the Imperial Knights would lead the charge with the Cadians in their wake. The Knights would lead a single assault carried out by the three strongest Knight Houses: House Minotos, House Chimaeros and High King Tolwyn's own House Draconis. The two remaining Houses, House Wyvorn and House Pegasson, would be deployed on the flanks and tasked with long-range fire support.With the Imperial commanders in agreement, High King Tolwyn retreated to his personal quarters to spend time with his children, Lady Jennika Tan Draconis and Kingsward Danial Tan Draconis, blissfully ignorant of the fact that even as he gifted his children with family heirlooms the traitor in their midst was already revealing every detail of the High King's strategy to the enemy. At the same time, House Chimaeros' and House Wyvorn's Sacristans readied their lords' mechanical steeds for the coming battle, anointing them with sacred unguent that would shield them from the Word Bearers' weapons.