The origin of American coffee

In fact, American coffee was during World War II, when American soldiers who could not get used to European espresso mixed warm water into the Espresso and improved the light coffee that suited their taste. Because the drinkers at that time were mainly American soldiers, the owners of the coffee shop regarded it as American coffee. In fact, most Americans use trickle filter to make black coffee, while the widespread use of Espresso diluted with water is mainly due to Starbucks.