Pharmacist Charles Elmer Hires debuts a commercial version of root beer at the Philadelphia Centennial Exposition.
Ray Allen opens a root beer stand in Lodi, California, which would eventually become the A&W restaurant chain.
The popularity of non-alcoholic root beer explodes during Prohibition.
The FDA bans safrole, the aromatic oil that initially gave root beer its distinctive flavor. The ingredient caused liver damage during animal testing.
A&W Restaurants throw a party by filling small frosty mugs with their classic mix of vanilla soft serve and root beer — and giving them away free!