The US invaded Iraq to control their untapped oil reserves. The US invaded Afghanistan to control major oil pipelines that flow through their desert.
Why has the US tried to depose the democratically elected left wing president of Venezuela? Because the control of the oil is in the "wrong" hands.
Why does the US remain such strong friends with Saudi Arabia, the country who's people attacked the World Trade Center on 9/11? Could it be "oil"?
Now, the fight between England and Argentina over the Falkland Islands resumes and what is in the middle of it? Oil.
Nearly 30 years after the two countries fought a war over control over the British-ruled islands, Argentina is angry that British companies are searching for oil and gas in the seas around them.
Last week, Prime Minister Gordon Brown said international law allowed British companies to operate freely in the area.
Argentina has said their operations violate its sovereignty and announced that boats sailing from its ports to the islands would need a permit.
Argentina said earlier this month that it strongly opposed energy exploration on its continental shelf.