Alotta people keep asking about the lore.
40K lore is fucked right now. They've changed alot. They've had multiple different authors write alot. previously the only cannon was the codexes and rule books but at some point they made the Black Library stuff canon too. When they did that it all went to hell just like comic book canon. Some authors ackknowlege some things others don't.
>StarchildThe Sensei were originally the children of the Emperor that he had fucking regular people. He had alot of kids being a fucking immortal being. They were immortal too.
>>5878727The Administratum are literally the bureaucracy and logistics of the Imperial.
Communication long distances are handled through Psychic messages and can arrive late or before you even sent them. Sometimes never arriving at all. This happens with everything through the warp.
>>5877043A standard chapter is 1000 Astartes. Some chapters like the Black Templars are overstrength. Some are near extict like the Lamentors
I HIGHLY suggest you stop seriously looking at Lore. They even started retconning core things from the 80s just for political reasons. If you want look up the Fragum Fragem something like that Lore Bible. /tg/ is the place to ask this shit.
There used to be only one race of human. Everyone was like the Spainiards. This made painting easier and GW only needed one type of skin tone. The Only "blacks" literally charcoal black were Salamanders due to gene seed anomaly. There were no asians or whites. All bred out of existence and killed in race wars prior to the Techno Barbarian wars.