I saw this table on Wikipedia (I know, not the most reliable source) that shows the GDP of the main powers during WW2. The German Reich (including occupied territory) in 1941 had a GDP greater than the United States, it seems to be the only year that the US was overtaken, and even in 1942 the German Reich had an impressive economy. It would make sense as Germany had conquered so much territory in such little time, and used a mass slave labour force to increase production. But everyone seems to make out that Hitler was just dreaming and the Nazi economy could never rival the US and was weak. So can anyone here provide an evidence on if this Wikipedia source is accurate?
https://en.wikipedia.org/wiki/Military_production_during_World_War_II
The sources they cite for the table are a:
non-existent website
A book on Soviet production figures (so I assume that's where Soviet figures come from)
I'm not saying it's wrong (and I need to look at the source they are using and methodology to verify) but wikipedia is basically citing nothing here.