The exact origin of the Martini is unclear, with records of drinks with similar ingredients in bartender guides from the late 19th century.
The Prohibition really saw a rise in popularity, along with the relative ease of illegal gin manufacture.
With the end of Prohibition and the availability of quality gin, the drink became progressively dryer.
½ Dry Vermouth
Stir in Boston glass with ice and fine strain into a chilled Martini glass, unless requested to be shaken – if so, shake and strain.