[jmacusa]

Invade from Alaska? Good Lord no. Take a look at the near disaster the Aleutian Campaign was. Knock Japan and Russia out? How? Attack Russia from east of the Urals? And how would you knock out Japan? The Battle of Okinawa was one of the most epic bloodbaths of WW2. It pretty much decided the use of the bombs as opposed to invading Japan.

[Kevmo]

We would have been taking on Russia 2 years earlier than we were attacked, pushing Japan out of mainland Asia and Germany after Russia fell. We would have been in the war against Germany before they even attacked France and England.