Tyranids beaten back on Hexis

On Hexis, the battles continued to rage despite the fact the world itself was no longer of any value. The Lysis system still marked an important way-station astride two warp lanes however, and control over the system would allow further expansion in the Hadron Expanse in the future. More importantly the armies of general Konev were under orders to prevent the tyranids from gaining any method of leaving the planet. R'lyeh appeared to be without a hive fleet, but was searching for a way off the world. If they found one, and managed to reach a world or worlds with rich biomass, the end results could be catastrophic for the Imperium.

In order to secure his own defensive position, Konev ordered his Gregorian airborne regiments to secure the hotly contested no mans land between Menthoteph and Praxis. The airborne regiments went in, hoping for a swift success, but what followed was an attritional struggle described by the Gregorian commander  as a "hot mess for the ages". The battle was bloody and expensive for both sides, but eventually the Scions, helped by the support of an Imperial Knight, were eventually able to secure the corridor between the two cities, joining up the two imperial sectors and forcing the tyranids back to the badlands to the north of the ruins.