ocr: There are different version of how the term"cocktail" - came into being. One IS that the first cocktail was served. during the . American Revolution.In' 1776,Betsy Flanagan, a tavern owner, serveda concoction ofrum, rye and fruit juices to Washington's officers. She.wouldgamish each-drink with a - rooster: feather. A Frenchman in the group came up with the toast, "Vive le cog's - tail" whichlater became - cocktail.