Ynnari move on Bymarsh

The next assault on Bymarsh was not long in coming. The Ynnari continued their push from Blackhollow and slammed straight into General Veers front line just days after the loss of the settlement further north. The Hammers of the Emperor were prepared for the onslaught, but despite holding the Ynnari on their left flank, they were swiftly forced back on the right. Then the flocks of razorwings swamped the astartes in the centre, and despite putting Yvraine out of the fight, the Yncarne then showed it's deadly hand. Using eldritch powers to manifest wherever it was needed, the avatar of death overwhelmed the imperial defences, and the remnants of the Hammers were forced to abandon their lines and retreat back towards the city itself.

The Ul'Staer craftworld then launched it's own attack, attacking the Hammers from the west and threatening to cut off the astartes from the city before heavier units from Veer's guard and adeptus mechanicus divisions could reach their positions. Supported by an astounding array of weapons platforms, the Aeldari tested the astartes as they attempted to fall back in an orderly way. In order to stem the tide the captain of the Hammers chapter ordered an attack to buy more time, as frantic messages from high command assured him that if he could hold for a few more hours, the Adeptus Mechanicus would be in position at Bymarsh.

The Hammers of the Emperor charged their foe, led by intercessors and their repulsor grav tanks. The initial assault was successful, causing mass casualties in the eldar ranks and pushing the aliens back. However the enemy regrouped and counter attacked,  massacring the Emperor's finest and decimating the chapter forces on the planet. However, the time bought by the sacrifice of the astartes was enough to allow the rest of the imperial army to deploy into Bymarsh. The battle subsided and the Imperium waited, wondering when the next assault would come.