User blog comment:WhiteSeraph/Alternate Timeline Idea That I'm Really Psyched About/@comment-3341288-20110926235531/@comment-10514705-20110927012602

I'd imagine that it would be the equivalent of trying to take out a Craftworld or an actual planet... where a full scale invasion is required.

If you take into account the sheer size of the craft, it would be a logistical nightmare trying to figure out how to destroy it and of course, enacting said plan. They would definitely provide a lot of scope for exploring many different types of warfare, alliances and technology. 8)

Also, it also depends on whether they have an Achilles Exhaust Vent or not.