original_query: What is the historical background of eggnog?
query: What is the historical background of eggnog?
answer: Eggnog's origins are debated, possibly stemming from a medieval British drink called posset.  The term 'eggnog' itself is believed to be an Americanism from the 18th century, with 'nog' possibly related to a strong ale or a type of mug.  Its popularity in the American colonies grew due to the availability of rum and dairy products, later shifting to whiskey and bourbon.  Early recipes often involved high alcohol content, leading to historical incidents like the Eggnog Riot of 1826.