Of course, the outcome of the war would not have been changed. The war was lost perhaps, when it was started. At least it was lost in the winter of '42, in Russia.
It is hard to cement any relations with any country based on promises that may not be deliverable.
Many, many years ago, I was one of the few conductors who talked to the audience and now a lot of classical conductors have figured it out... otherwise, you just get the back of someone's head playing music you could hear on a CD. It's not enough anymore.