[lukan]

"Russian willingness to throw bodies at the fight."

Russia also build some tanks while being invaded, ~90k at the end of the war outcompeting german output at 3:1 (I suppose they are included in your allied 276k number?)

[dgoldstein0]

with the help of US industrial advisors who helped them set up factories / production lines.

https://www.youtube.com/watch?v=vrclztGCg6M is a decent watch, though really only tells the "US out produced everyone" part of the WWII story.

I recall seeing a better article that talked about WWII tank production but I can't find it right now.

[senderista]

The USSR was also able to protect most of their factories from bombing raids by moving them to the Urals. Germany and Japan never had that luxury.