American Mars - Much More Thank Just a Mars Bar Mars Incorporated of the USA began its life in the confectionery industry in the 1920's, with it's top selling chocolate, the Milky Way Bar. Mars Incorporated is owned by one little family, pretty amazing. Mars came to the UK in the 1930's and shortly after the first Mars Bar was invented here. They own loads of brands of confectionery, some of them being Wrigley's and M&M's. Oh and Spangles was a brand of Mars, but sadly it was discontinued, remember Spangles?