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Adolf and Rudolf Dassler ran a factory together making athletic shoes in a small Bavarian town. But after World War II, the founders of Adidas Sports-chuhfabriken (the first word a contraction of Adolf Dassler's name) had a violent disagreement that no one can explain. Rudolf decided to make tracks and started a rival shoe company across the river in the same tiny mill town. Before long his company, Puma, had become one of Adidas's strongest international competitors. When Adolf died in 1978, the brothers had not spoken to each other for 29 years.