She claimed a birthdate of 1893 and a birthplace of Auvergne; she was actually born in 1883 in Saumur - her mother worked in the poorhouse where Gabrielle was born, and died when Gabrielle was only six, leaving her father with five children whom he promptly abandoned to the care of relatives.
She adopted the name Coco during a brief career as a cafe and concert singers 1905-1908. First a mistress of a wealthy military officer then of an English industrialist, she drew on the resources of these patrons in setting up a millinery shop in Paris in 1910, expanding to Deauville and Biarritz. The two men also helped her find customers among women of society, and her simple hats became popular.
Soon she was expanding to couture, working in jersey, a first in the French fashion world. By the 1920s, her fashion house had expanded considerably, and her chemise set a fashion trend with its "little boy" look. Her relaxed fashions, short skirts, and casual look were in sharp contrast to the corset fashions popular in the previous decades. Chanel herself dressed in mannish clothes, and adapted these more comfortable fashions which other women also found liberating.
In 1922 Chanel introduced a perfume, Chanel No. 5, which became and remained popular, and remains a profitable product of Chanel's company. Pierre Wertheimer became her partner in the perfume business in 1924, and perhaps also her lover. Wertheimer owned 70% of the company; Coco Chanel received 10% and her friend Bader 20%. The Wertheimers continue to control the perfume company today.
Coco Chanel introduced her signature cardigan jacket in 1925 and signature "little black dress" in 1926. Most of her fashions had a staying power, and didn't change much from year to year -- or even generation to generation.