Although Russia could be a great ally against Bismark, we need to develop a good relationship with her if we are ever to take on the Mongols. The Mongolians and the Russians are currently pleased with each other, so if we go to war against Mongolia without first befriending Peter, Peter will be offended by our act. This could prevent us from ever allying with Peter, or worse yet, Gehngis might be able to get Peter to defend the Mongolian lands. For those reasons, I think we should actively ask Peter for Open Borders to develop a better relationship between our people.