Oil is still being exported, though in much smaller quantities, & more expensively given the high cost of circumventing sanctions using middlemen & ‘dark’ tankers (they switch off their #transponders)
#Iran alone
https://spectator.us/iran-alone-tehran-hostilities/
 https://spectator.us/iran-alone-tehran-hostilities/
#GOP #UNIDO
& isolating Germany led to WWII