[Ryzorian]

The US embargoed Japan, creating the situation that occured. Thus allowing the chance to declare war on Germany that FDR hoped for. Wether it was a strange confluence of events or artful manipulation is beside the point, because of those events the US got involved in a major way.

Now I happen to think FDR, who was in contact with Churchill since the war started in europe, helped the scenario along via political manouvering, your free to disagree with that, that's fine. It's not the end of the world either way.