Diamond Springs, CA replied:    Root beer, also called "The drink of the navy", is a carbonated , sweetened beverage , originally made using the root of a sassafras plant (or the bark <_ target="_blank" href="http://en.wikipedia.org/wiki/Fermentation_(food)" forms:_="forms:_" two="two" comes="comes" america="america" north="north" in="in" popularized="popularized" beer="beer" root="root" flavor.="flavor." primary="primary" the="the" as="as" tree="tree" sassafras="sassafras"