lurker's comment: That looks much better set up for attack! What surprises me is that Alex hasn't called you and asked about all your units on his borders. Normally you get this in a situation like this, with 2 choices for answer: "You're right, we're here to attack you (declare)," or "Our units are only passing through." If you take the second choice and still declare, that's obviously something Alex will not take kindly to. If you take the first option and declare, then you can't ask Catherine or Napoleon what they're willing to pay for you declaring on Alex. So it's better not to get this dialogue box. I would ask you neighbours now what they're willing to pay and go for it. This should still not be easy campaign with The Great Wall there.