everything being dollar denominated, that means in order to transact right, it's got to go through dollars. And basically we have control over dollar denominated assets and those points throughout the financial system.
for - explanation - sanctions - chokepoints - US reserve currency
explanation - sanctions - chokepoints - US reserve currency - If a country is sanctioned, it means that they can no longer use the US dollar for trading for goods (like weapons) - If a sanction country tries to buy a weapon, then it must transact with US dollars because that is the currency everyone uses to trade with - Either that country has enough paper US dollars to trade, or they must do it electronically - However, if the country is sanctioned, those US dollar transactions are monitored by the US government and will be disallowed - So it is the electronic means of surveillance of US dollar transactions which make sanctions effective