Quick Lore question: is there a reason the Black Crusades can't

>>49687596
Something something Red Path

They've tried to explain and re-explain it for years now, and honestly I'd like it more if they just kind of started ignoring Cadia during the crusades
Yes Cadia can still be the "elite" planet because being near the EoT subjects them to constant raids, but the Crusades can go off to Ultramar, Baal, and Necromunda instead of always coming back to Cadia.

>>49687596

Cant any warp-capable vessel teleport from any point A to B through the warp?

Why dont they all just warp to Terra?

>>49687700
>Why dont they all just warp to Terra?
Maybe the Lighthouse has some *magic* that prevents evildoers from getting close? And in the time it would take them to reach Terra from the edge of their warp-jump, they know the whole Imperium would have arrived and be waiting?

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>>49687596
>Quick Lore question: is there a reason the Black Crusades can't just bypass Cadia?

They can and do.

>>49687596
Cadia represents the only stable way to enter/exit warp space in the region of the Eye.
Going other ways means that Bad Shit Happens, including: Running into warp creatures that wreck your shit, becoming permanently lost in the warp currents, warp eddies ripping your ship apart.
Yes, you CAN bypass the Cadian Gate, but to do so means you are risking at least a 50/50 chance of success. Now take an entire army and make a 50/50 for every single ship in it, with it's full crew and soldier compliment.

The lore answer is that there is a constant huge fuckoff amount of instability in the Warp near the Eye for obvious reasons. And the "Cadian Gate" is in the center of a path of calm, and you mostly have to pass through to leave the Eye by ship.

And since you drop out of warp or die if you go too near gravity/stars/something I can't remember, the fleets get engaged by the Imperial Defences

>>49687700
>Cant any warp-capable vessel teleport from any point A to B through the warp?
>Why dont they all just warp to Terra?
Because you don't actually know how Warp travel works.

simply leaving is easy, as the number of raiding parties attest, but to establish a stable supply line, requires several ports in the storm, and a lot of relatively calm space, you cant just put a waystation anywhere

warp travel is similiar to wooden ship sailing, without established shipping lanes, your transports are gonna get sunk, and the only space of relative calm is through cadia, going around it is begging to be destroyed by a warp storm, chaos ships are still vulnerable to hazards of warp travel most of the time

>>49687596
As >>49688036 says, the Black Crusades can and do bypass Cadia. The reason they often attack Cadia is that it's very hard to establish a reliable supply line between the Eye of Terror and the rest of the Galaxy without the Cadian Gate. Worse, the Cadian Gate itself is an excellent position from which to raid and disrupt any supply lines out of the Eye of Terror.

It's the same reason why historical armies would stop to siege castles instead of simply bypassing them. Sure they could bypass them, they often did bypass them, but there was a risk in leaving active enemy combatants in a fortified position behind your lines. They could sally out to attack your rear areas and then retreat to their fortress whenever you sent troops to try and engage them. Even a very small force can cause a hell of a lot of damage that way.

>>49688253
Probably that.

Realistically you can probably just go around planets. Even if you can't warp through planets, spaces as you know is big. But doing so would be a strategic illadvised for various military and logistical reasons. They need to take and hold territory before advancing

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>>49687700
See these white lines? Those are warp routes. You don't have to travel along them but if you don't, your odds of losing between 50 and 100 percent of your fleet due to horrible things in the warp increases exponentially. Traveling within the warp is not like Star Trek. There are set paths that ships need to take in order to reliably get to where they need to go. Ships who don't follow those paths, those who try and find shortcuts, easily and repeatedly get lost in the warp. It's how the Imperium can both lose hundreds of ships in the warp, and have ships that have lasted for thousands of years. As long as you stay on the stable routes and have a proficient navigator, you're significantly minimizing your ship's risk.

That said, even while traveling on stable warp routes, ships still exit the warp at each stop to both reorient themselves and give their navigator a rest. This usually means to get back into the warp, they have to travel to a mandeville point on the opposite side of the system to get back on the same warp route. Cadia is the absolute best place for that rest to occur when trying to exit from the Eye of Terror.