It has been said that “an army marches on its stomach,” and as much as this is true, it has to be recognized that in the warfare that became World War II, that the Axis powers of Germany, Italy, and Japan, could not successfully march without an ample supply of oil, because the engines of war necessitated that oil, which is why the non-aggression pact between Germany and the Soviet Union was broken by Germany, despite the obvious issue, that a two-front war was something that Germany did not desire, yet, this is what they did, ultimately to their own destruction.
Indeed, the lessons about the need for oil when it comes to warfare should never be discounted, and when we look at the locales of where the biggest disputes of today are, it often revolves around oil and the control of that oil, because not only does the machinery of warfare depend greatly upon oil and all the uses of that oil, including chemicals and plastics, so of, but there isn’t anything readily available to replace that need and therefore the access to a ready supply of oil is paramount.
It must be acknowledged that history may well have been different if the Axis powers had a ready supply of oil, because they were well-positioned to accomplish their objectives, in which, Western Europe could easily have become controlled by the Axis powers, and in all likelihood, an accommodation of some sort could have been worked out with America, in which the United States would have sole control of the Americas, whereas the rest of the world would be in the hands of the Axis powers and their proxies. This though, is not how the war ended up, because Germany made the fatal error of a two-front war, which wasn’t prudent and clearly had not been fully vetted and thought through, but alas, that is part of the problem when those that are the aggressors find that everything is going their way, without comprehending that situations are subject to change, even drastic and unwelcomed change.
So too, there is a lesson there for the world of today, which is that those who are oil dependent are invariably going to be seeking a way to avert such a dependence, through perhaps alternative energy sources, or through strategic and trade alliances, or through aggression of some sort. That is to say, countries that have a pressing need for oil are quite capable of making decisions which they believe will take care of that need, which may involve subterfuge, interference in the domestic affairs of another country, or some combination, so of, because those that are dependent on oil, do not desire to be placed in the unenviable position of a possible embargo or similar, without at a minimum, having a ready response to such a contingency, of which, no doubt this was the case for Nazi Germany, which knew what it wanted but went about it in a fatally wrong way.