What happened to the 11th legion | 40k lore

In todays episode I have an unhinged meltdown about lore implications not for the first time. The fine lad who did my Profile pic!   / scrumptiousbean   Music used: The Caretaker - A4 - Childishly fresh eyes Omori - Spaces Inbetween Discord!!!   / discord   These videos are meant for educational and entertainment purposes, I do not own, or ever will claim to own any of the art pieces used in this video. If you see any of your artwork and would like it removed or credited, message me on twitter with screenshots.   / arthurbones1