The premise of this article is that Japan joins the Allies in World War II. The POD is the Nazis taking all of the colonies of the countries they occupy in Europe. So in other words, there is no Free French army, and Charles de Gaulle fades into obscurity. As a result, when Japan attacks French Indochina on September 22, 1940, Nazi Germany considers this an attack on Nazi territory (since France has been occupied at this point). As a result, Nazi Germany declares war on Japan, and Japan enters the war on the side of the Allies. China, meanwhile, enters the war on the side of the Axis. What do you think happens next? I encourage you to add a hypothetical timeline. Have fun!