I don't know if you're a history or geography buff Iisnyk, but WWII took place in Europe and North Africa, not in the US.

Libya (located in North Africa) was a major crude oil supplier to Europe (where Germany and Italy are located) until the US led destruction of that country in 2011.

From Wikipedia:

"Oil reserves in Libya are the largest in Africa and among the ten largest globally[1] with 46.4 billion barrels (7.38×109 m3) as of 2010."

https://en.wikipedia.org/wiki/Oil_reserves_in_Libya

From 2011, Reuters:

"Europe's refiners struggle to replace Libyan oil"

"LONDON/DUBAI (Reuters) - The loss of Libyan oil is a heavy blow to European refiners who face a costly struggle to replace the easy-to-refine crude because of a shortage of matching grades."

https://www.reuters.com/article/us-libya-crude-idUSTRE71N3LJ20110224/