Board Thread:Warhammer 40k General Discussion/@comment-25618639-20141214213749/@comment-11526152-20180222022130

Well as you state all the obvious, the Imperium of Man will keep on grinding through like they have done for the last 10,000 years. Even if the GE win on the space battle scene, they do not have the manpower to keep all those conquered planet, even if let's say, those planets have no value whatsover and the GE decided to burn them all. It will take a lot of time to do so. Also, you must keep in mind that if the GE decided to invade or conquer the 40k universe then the 40k universe law will come into play. And the only law I will use in this sense is Warp Travel, 40k warp travel is going through hell, and the Imperium have been doing this for the last 10,000 years and they have not died off just yet(because of plot armor) But anyways, Star Wars hyperspace travel is relatively safe, then again, it's more safer than 40k. Now back onto the matter of warp travel, if Star Wars were to invade the entire Imperium of Man, then there is no such thing as safe hyperspace travel. If you were to say, nah, the Star Wars universe hyperspace will in anyway supersede 40k warp travel, then if that's the case, the AdMech will in some time(probably another 10,000 years) reverse-engineer the Hyperspace travel technology for the Imperium. And then the GE will be at the mercy of the resurgent IOM.

SO, in a nutshell, the GE will win the first half of the war with the IOM but given the current IOM state(the return of Primach Rowboat and the Radical Archmagos Cawl), they will bounce back and win the second half of the war.