Imperium fight back on Helos Majoris

By late 03.022M42 the Imperium had established a strong base on Ferrosiun Secundus, although no overall general had been put in charge of Imperial forces. The Imperium had several astartes and other elite forces operating somewhat independently and pursuing their own agendas without an overall plan for the Rifts, and this was exemplified by the Adeptus Mechanicus, who had landed several forces on Lodax and Helos Majoris, searching for ancient lost STCs and other valuable resources.

On Helos Majoris the initial expedition had found the world already infested with tyranid creatures, and the Mechanicum deployed extra forces to the world in order to control the infestation. A large engagement took place on the plains of the main continent as 03.022M42 drew to a close, with the well equipped Adeptus Mechanicus army succeeding in driving off the large alien creatures. Exposed to heavy firepower on the plains of Helos Majoris, the tyranids were cut to shreds, and the remaining xenos creatures were pushed back into the rugged terrain of the central mountains. For now, and for the purposes of the Adeptus Mechanicus aims, this was sufficient.