I've said it already, but it must need repeating. So take it from a military veteran. WHEN YOU ARE BEING OVERAN OR RETREATING YOU DESTROY ANYTHING AND EVERYTHING YOUR ENEMY CAN USE WHICH YOU CAN NOT TAKE WITH YOU. No self-respecting army is going to leave a stockpile of ammo, vehicles, or even food their enemy can use against them. 10 sticks of C-4 (or 40k equivalent) place in the depot and viola no more ammo, and took less than 5-10 minutes, an amount of time base defenders can most likely stall for. Same thing for factories etc. Scorched earth brother, leave nothing for your enemy.
I heard you the first time. But as historical experience has shown its, to my knowledge, not often that such things are 100% when its on a world war size and I kind of assume that the Chaos forces brought down supplies for themselves to the surface which would constitute the majority of the supplies that they have present.
Maybe, but unlikely. We all know the typical degree of pre-mission planning in most chaos missions. Besides, they had their fleets there, which handled air to air supperiority. In fact, until the Imperial forces rebounded after the chaos fleet split up to go hound and dilute their forces all over the sector they held space/air supperiority over every major battlezone with their fleet, they didn't need ground based forces. When their fleet was forced to flee their airpower went with it.
We do? I'd say its very different between warbands and that the Chaos Space Marines, who most likely leads the operations, probably have a fairly good organization of the operations. Maybe not Imperial style but enough to make things work and not forget obvious things. And I still think that the Chaos forces, or at the least the Chaos Space Marines and the Traitor Guard formations brought gear for all manner of different uses with them, including surface-to-air weaponry in case local air superiority would not be there or something would go wrong.
And see what good it did them, it took men, materials, and ships away from the main battle areas and gave the imperial fleet many easy targets to engage. The chaos fleet was too powerful to be taken on with the Imperial fleet until the chaos fleet did this. Afterwards the consolidated Imperial fleet went around and destroyed one or two ships in numerous systems, slowly but surely reversing the numbers issue.
That's not how I read it. I read it that the Chaos fleet was initially too strong for the local Imperial fleet and given how much territory the Chaos followers captured I'd say that the Imperium has more problems than just Cadia. Otherwise it wouldn't make sense for GW to go on and proclaim the Chaos side as victorious.
Perhaps you are, too bad it seems you don't understand the tactical and strategic situation. The chaos fleet was broken, spread too thinly and the groups of one or two chaos ships were being systematically picked apart by larger imperial fleets. The Imperium didn't need a blockade, they were hunting. With enemy forces routed and unable to return to pick a fight, a single ship is more than enough in most cases to gain air/space superiority over a planet with ongoing fighting like Cadia at this point. Being a galactic government the Imperium would not simply vacate all their resources from every other fight to engage one enemy. They needed reinforcing along a few fronts therefore others lost some of their combat strength to provide it. The weakened fronts weren't helpless, but didn't have the same power as they did so operations were likely scaled down to sustainable levels based on their lower combat capabilities.
Maybe but most likley not. And of course the Imperium was not stripped bare, but they did pull all they could into the protecting Cadia and surrounding sectors, and it has shown that they are weakened as the Tau expansion shows. And what the Tyranids, Necrons, Orks etc. were doing is pretty obvious when there's a lesser Imperial presence to face them down, and which will lead to even harder wars for the Imperium unless they are stopped fairly soon.
In the Imperium? Yes it can. The imperium's weaknesses do not include maintaining supplies or supply chains, its creating the supply chains. Once all the pieces are in place the Imperium can keep things going for a while. This is moot anyways, again, the chaos fleet was broken, after a short time hunting and destroying major enemy hold-outs, the typical Gothic fleet is all thats needed to continue hunting down the last stragglers when they show up, as well as support any major Guard operation to retake planets.
And where are these Guard troops going to be taken from? And who is guarding the Gothic Sector while its fleet is away at Cadia? Once again the Imperium must leave an entire sector undefended from space, more or less, to re-take what they have lost, and which may indeed already be to corrupt to be re-taken, and which could well open to way for more enemies to enter the backdoor.
Anyways, if you still don't believe this ex-military intelligence specialist who spent 10 years analysing just such socio-military-political situations then nothing will, so this is all I'm going to visit upon this thread.
This is the internet. Everyone is professor, expert, war veteran etc. What authority that you claim to possess has little relevance for me as there is no way for you or me to verify it or prove it.