Originally Posted by Trixie
The same Imperial Guard that held against 100+ Chapters worth of Chaos Marines on Armageddon, eliminating a few dozen worth permanently? Or the same Imperial Guard who failed to held Cadia
The Imperial Guard have never lost control of Cadia in the entire time it's been colonized. It wasn't until the 13th Black Crusade that Chaos even managed to obtain more than a temporary foothold on its surface.