Earth-9

Earth-9 is a reality in the multiverse that's Earth's history diverged shortly after World War I.

History
Earth-9's history was identical to that of Earth-95 and real life until the end of World War I. Following it, there was less disarmament than there was on Earth 95 and in real life. A consequence of this was that the Allied militaries were stronger during Hitler's initial rise to power and, perceiving the danger that Hitler represented, several countries that had been opposed to Germany in World War I moved in and neutralized Hitler and his budding war machine before they had a chance to start a second World War. The conflict (such as it was), ended in 1939, ending Hitler's war of conquest and genocide before it had even begun.

What happened to this Earth afterwards is currently unknown.