Sure, the status quo is in favor of the U.S., and we ensured that oil continued to be sold to the U.S., but it's also in favor of France and Germany and the U.K. and Australia, etc, and we ensured that oil continued to be sold to those countries too. It doesn't really make sense to call that "conquest."
Since when does conquest have to benefit just one party to be called conquest? If Russia and China split the US amongst themselves, would you call it conquest?
Did we split Iraq amongst the U.S., France, Germany, the U.K., Canada, Australia, etc? When many beneficiaries are involved, a military action seems less like conquest and more like an attempt to maintain a certain balance of powers.