Vox is a general interest news site for the 21st century. Its mission: to help everyone understand our complicated world, so that we can all help shape it. In text, video and audio, our reporters explain politics, policy, world affairs, technology, culture, science, the climate crisis, money, health and everything else that matters. Our goal is to ensure that everyone, regardless of income or status, can access accurate information that empowers them.
This kind of historiography is incredibly speculative. There is a reason those kinds of questions have their own copy paste answer on askhistorians.
You can speculate endlessly about what would’ve happened if the USA and GB would have done nothing at all. Like the source states, the second battle of El-Alamein was incredibly significant and denied Germany the middle eastern oilfields for its parched panzers. Maybe with no American activity Japan might have an appetite for some Manchuria.
We can go on forever.
Btw the source you linked doesn’t speak of the program you suggest in your title. You could de-editorialize the title.
The title is literally the title the Vox article has. Meanwhile, if anybody has a good idea of what the likely outcome of the war would’ve been, it’s certainly the US military.