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When a unit of bikes assault a unit in difficult terrain, do the bikes take a Dangerous terrain test?

Per the BRB Bikes treat Difficult terrain as dangerous terrain, at least in the movement phase per pg 45. There is no mention of taking one under the Assault section so it appears that they don't RAW. I think the intent is that they do and I believe most people play that they do take the test.

The only mention is if a bike charges an enemy behind an Aegis defence line. There was just a question about it in a game the other at my FLGS. Thanks for the input.

Any time bikes move through difficult terrain they have to take the dangerous test. In 6th edition this includes pretty much any time the model moves. In 5th ed some moves (Pile Ins, possibly Consolidates, IIRC) ignored Dangerous checks. Now pretty much none of them are exempted- check out the assault rules- they specifically note that Pile-ins at Initiative and post-combat Consolidates are not slowed by Difficult but STILL trigger Dangerous terrain checks.

The reason that defense lines and barricades are specifically called out in the rules for bikes and assault is because, per the rules for those terrain piece on page 104, models don't technically have to cross one of those to count as being in base contact with an enemy model on the other side. If the assaulting model and the model being assaulted are both touching a barricade or defensive line on opposite sides, and are within 2" of one another, they count as being in base contact. So the bike rules are making clear that even if you don't physically move your bike model over the wall, the fact that it's assaulting across said wall still triggers a Dangerous test.

 Mannahnin wrote:
Any time bikes move through difficult terrain they have to take the dangerous test. In 6th edition this includes pretty much any time the model moves. In 5th ed some moves (Pile Ins, possibly Consolidates, IIRC) ignored Dangerous checks. Now pretty much none of them are exempted- check out the assault rules- they specifically note that Pile-ins at Initiative and post-combat Consolidates are not slowed by Difficult but STILL trigger Dangerous terrain checks.

The reason that defense lines and barricades are specifically called out in the rules for bikes and assault is because, per the rules for those terrain piece on page 104, models don't technically have to cross one of those to count as being in base contact with an enemy model on the other side. If the assaulting model and the model being assaulted are both touching a barricade or defensive line on opposite sides, and are within 2" of one another, they count as being in base contact. So the bike rules are making clear that even if you don't physically move your bike model over the wall, the fact that it's assaulting across said wall still triggers a Dangerous test.

Thank you!

The reason that defense lines and barricades are specifically called out in the rules for bikes and assault is because, per the rules for those terrain piece on page 104, models don't technically have to cross one of those to count as being in base contact with an enemy model on the other side. If the assaulting model and the model being assaulted are both touching a barricade or defensive line on opposite sides, and are within 2" of one another, they count as being in base contact.

That's really good to know. Thanks.

 Dozer Blades wrote:

The reason that defense lines and barricades are specifically called out in the rules for bikes and assault is because, per the rules for those terrain piece on page 104, models don't technically have to cross one of those to count as being in base contact with an enemy model on the other side. If the assaulting model and the model being assaulted are both touching a barricade or defensive line on opposite sides, and are within 2" of one another, they count as being in base contact.

That's really good to know. Thanks.

And that is why I never put my guys in contact with the ADL. They are always at least 1/8th - 1/16 inch away from it.

The downside of placing your models back from the ADL is that it becomes increasingly likely that the ADL will also then grant cover to the enemy units your unit wants to shoot at.

 Mannahnin wrote:
The downside of placing your models back from the ADL is that it becomes increasingly likely that the ADL will also then grant cover to the enemy units your unit wants to shoot at.

Not if they are 1/16th of an inch from the ADL.

But I get what you are saying, any further and "it becomes increasingly likely that the ADL will also then grant cover to the enemy units your unit wants to shoot at."

Yep. That can work. Though with 1/16 of an inch you want to make sure you make clear to your opponent that they're not actually in base contact, as the time they move (or deploy) there, to avoid arguments or misunderstandings later.

Another wrinkle I've encountered is that depending on the specific models in the firing unit, and the angle of approach of the units advancing on them, it's possible that the Aegis will obscure 25% or more of the enemy models even when your defending models are RIGHT behind or even in base contact with your Aegis line. In that situation I've found that opponents are usually amenable to agreeing that defending models in base contact with the Aegis can see through/over it with no problems, but that of course comes with the tradeoff of the assault consequences we discussed above, and removes the 1/16" option.

They do, however, not get hindered by it. So you still only roll 2d6 for charge range not 3d6 and take 2 lowest.

Bikes are unhindered by difficult terrain, only roll dangerous. I was quite ecstatic when i learned that.