Cerberus forces have been landing away from the Tuchanka battlefields. It seems that their target is a surface to space cannon. It seems that that cannon is clearing space for an incoming Cerberus cruiser which could devastate the Krogan forces if taking them unaware. Shepard and crew must secure the cannon controls which may prove difficult with wave after wave of shielded and elite Cerberus troops defending the cannon control panels as well as their power generators.
Video – Mass Effect 3 Walkthrough Part 14 Tuchanka Cerberus Attack Renegade HD 720