One interesting tidbit is that Iraq in the early 2000s got into the idea of selling its oil in terms of Euros rather than dollars. Later on, Gaddafi tried to set up a new African currency backed by gold and oil.
Assuming the 2003 invasion of Iraq doesn't happen, what if in the 2000s Libya and Iraq had both gotten into denominating their currencies in Euros as a means to stick it to the Americans?