A notable business rivalry has been uncovered, involving two well-known companies, Puma and Adidas. This rivalry is considered one of the most extraordinary of the 20th century. The origins of this rivalry are rooted in a family feud between two brothers.

Further details about this fascinating story are available from BBC Mundo. For those interested in learning more about this remarkable business rivalry, additional information can be found through the source, providing insight into the events that unfolded over the decades in a city in Germany.