Anyways. Conventional warfarel.. I don't know. Asia or Europe could prevail in Eurasia (not solemly though, I doubdt. Too long supply lines for China-France for one faction to dominate), USA would dominate in both Americas. I doubdt that any faction would be able to mount succesful naval assault. Not until many, many years of infighting at least. At which point their starting navy/air force would be either vanquished or obsolete.
Better to just not wage wars.