>>96491862
>>96490126
>The combined manpower of all the Tau and auxiliaries would not be .01% of the manpower of the Imperium.
Then why the Imperium is afraid to invade T'au space?
>But still nothing compared to what the other factions have.
As per the lore, the T'au have superior technology to the Imperium especially in sensor and stealth departments.
>Put Farsight or Shadowsun up against a Primarch and they will get bitchslapped
Primarchs have lost against Marines. It's established that Shadowsun and Farsight are far above Marines in warmaking, and in the case of Farsight, in physical combat.

>>96491862
That's cope.
We have sources from the codexes and campaign books
Novels and short stories that show the lives of allied races on the ground. Alsop reports on the Imperials about the state of the T'au allied races.
All of them state generally the same thing. They aren't slaves but (second class) citizens