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Is any peecentage flashed in any book, rule book, etc... to give a rough ballpark?

I mean...isn't it like...all of them?

 Tyzarion_Kronius wrote:
Is any peecentage flashed in any book, rule book, etc... to give a rough ballpark?

I don't remember ever seeing hard figures.

 Haasbioroid wrote:
I mean...isn't it like...all of them?

Nope - there are still loads of non-Imperial human worlds. Rogue Traders regularly find them and try to add them.

Precipice in WQ:BSF is an example of a non-Imperial human settlement (a space station), and the T'au Empire contains several 'human' worlds.

It's likely very hard to say because even within the Imperium there are worlds that vary in population density, use and such. Some worlds are almost paradises of greenery and life with smaller populations; others are harsh cruel worlds with huge hive cities; some are elite worlds populated by the rich; others vast sprawling cities that cover the whole planets surface; full of workers, miners and others who serve the Imperium.

Plus some worlds are not called to muster, whilst others are. Even of those worlds called, it would seem that the number of troops given varies a lot depending on the cause for calling muster as well as the political situation. Some worlds might be demanded of to send more of their population to war; others might willingly send more to try and curry favour.

Meanwhile others might send far fewer because the transports have limited space; or because of a regional tiff with another system so that the governor wants to hold onto more of their own troops etc...

In theory ALL are called to serve the Emperor and all can be called upon to go to war.

They gave a hint at Imperial mobilisation in the 3rd edition Tyranid codex when a council appointed by the High Lords to determine how to beat the Tyranids made the following recommendation;

"Among other items, the report advised that to meet the expected Tyranid threat, the Administratum's Departmento Munitorum would have to increase the mobilisation and recruitment of new Imperial Guard regiments by up to 500%. Such a preposterous undertaking would require that the Imperium recruit every single human being -- man, woman and child -- now living in the Segmentums Solar, Obscurus and Tempestus."

So that would suggest that, on paper at least, current mobilisation into the Imperial Guard stands at about 1/5th of the combined population of these three segmentums.

Edit: or would it be 1/6th? I'm not sure if they mean increase mobilisation to 500% of current or increase mobilisation by 500% to 600% of current!

However we have to temper that against the accuracy of the Imperiums own bureaucratic systems. Don't forget they've lost whole planets and systems within their own filing systems. It wouldn't surprise me if some of their estimations such as the percentage of civilians tithed to the military could be wildly inaccurate.

Plus don't forget the Imperium is so heavily geared up for war that many services are likely "for the war effort". Food, reproduction, manufacture, resource extraction. Many of the Hive cities are just churning out weapons and munitions and fuel for the war machine.

It's going to vary based on world, but generally fall into one of four categories.

The military worlds like Catachan or Cadia, where the IG regiments are essentially the only thing the planet produces. Those planets will conscript at a rate near 100%.

The big honking hive worlds or industrial worlds where population is a problem. Worlds like Necromunda or Stratigardin, where the planet produces other things as their primary economic resource. The guard tithe is a way to kill two birds with one stone: reducing the dependent population and appeasing the Imperium by supplying paying them in a resource that is more valuable to the Imperium than it is to the planet. The actual percentages on these planets are going to be low, but the numbers will be unbelievably high. On a world like Stratigardin, with roughly 100 billion people, figuring an 18.2/1k birthrate, even if you only took 1% figured off of new births, you'd be tithing 18.2 million people every year. A negligible number.

The next kind of world would be the kind where the global economy is based on some other resource, and can't handle diverting too much of it, so they are forced to tithe to the guard to make up the difference. These worlds would see the highest percentage of conscription (save for military worlds), most likely on some kind of hideous 'merit' based system. (Penal legions, drafts of the unemployed, etc)

The last would be worlds where some other global resource is valuable and plentiful enough that IG conscription isn't required. Those planets might still tithe units to the guard, even though they don't technically have to. You probably would see an almost entirely volunteer guard from those worlds.

(These are all just my opinions based on what I've read..they obviously aren't gospel or anything.)