Doom at Thermolyp

The Doom at Thermolyp was an Imperial defensive campaign carried out by the Thunder Guardians Space Marine Chapter when they came to the aid of beleaguered Imperial forces upon the world of Keddian when they were being assailed by invading Orks.

Background
In 599.M35, the Imperial planet of Keddian was invaded by a large Greenskin force intent on conquering the planet and stealing its resources for themselves. Several local Astra Militarum Regiments mobilised to answer the sector-wide distress call for aid. Although the Imperial defenders put up a valiant defence, they were no match for the neverending tides of the Orks, who seemed to possess numbers without end. During the final epic battle of the campaign, Astra Militarum forces held defended the valuable pass of Thermolyp, in order to prevent the orks from ravaging the planet's capital city. Despite their best efforts, they faced inevitable destruction at the hands of the marauding greenskins forces.

As the orks prepared one final assault against the beleaguered Imperial forces, they were saved from annihilation by a miracle seemingly sent by the Emperor Himself, in the form of the Thunder Guardians Space Marines! Launching a massive drop pod assault directly onto the Imperial troopers position, when the drop pods touched down they disgorged their cargo, the battle-brothers of the Thunder Guardians, who immediately began to launch a fierce counter-attack. With the assistance of their Astartes allies, the Imperial forces were able to turn back the greenskin assault. Unfortunately, the Imperial victory came at great cost, with the loss of half of the Thunder Guardians' 5th Company, including their commander - Captain Leokis. But through the sacrifice of the Thunder Guardians the world of Keddian was saved.