OBQ 1487: This means war.

Wars have scripted a big part of human history and same is true for business history. It was World War-II that left a lasting impact on these two brothers. It might have done too much harm to their personal relationships but did wonders for their customers as well as to exchequer of their fatherland!

Id the brothers.

Answer: Dassler brothers of Adidas and Puma.