[l332mn]

The most credible theory in my eyes as to why they needed to invade Iraq, was that Saddam intended to boycott the US dollar, and rather sell Iraq's oil in Euros.

https://www.theguardian.com/business/2003/feb/16/iraq.theeur...

There's a de facto global tacit agreement to sell oil in US dollars - on pain of unilateral sanctions by the US or military intervention by the US military. All countries who deviate from this agreement are in fact deemed enemies of the US. This includes, Iran, Venezuela, Russia and China, and (formely) Iraq and Libya. When they don't, that means that the US can't simply print dollars as they please and force other countries (who purchases that oil) to purchase US debt as well. Pricing oil in currencies other than the worlds reserve currency (the US dollar) affects the dollar value greatly. The US printed about 10 trillion dollars in two years. The rest of the oil-dependent world pays the price.

[Supermancho]

> There's a de facto global tacit agreement to sell oil in US dollars - on pain of unilateral sanctions by the US or military intervention by the US military.

That is 100% how the US has managed to maintain as a "stable" global currency.