I'll leave it to readers to look up on the details of Bretton Woods or the Nixon Shock or any basic econ resource to understand why oil or military aid is not r

I'll leave it to readers to look up on the details of Bretton Woods or the Nixon Shock or any basic econ resource to understand why oil or military aid is not really the main factor behind the reasons of the US reserve currency. The Nimitz cannot physically stop the Iranians from closing the Straits of Hormuz if they wanted BTW, it's rather that there isn't much point to Iran closing said straits and just angering pretty much everyone else in the world. You can look at Yemen to see how things really go when an actor dosen't care anyways.