[Ans] Which two brands were founded by rival brothers?

Step 1 : Introduction to the question "Which two brands were founded by rival brothers?"

...Rudolf "Rudi" Dassler (26 March 1898 in Herzogenaurach, Germany – 27 October 1974 in Herzogenaurach) was the German founder of the sportswear company Puma and the older brother of Adidas founder, Adolf "Adi" Dassler. The brothers were partners in a shoe company Adi started, Gebrüder Dassler Schuhfabrik (Dassler Brothers Shoe Factory). Rudi joined in 1924, however the brothers became rivals following World War II and started their own companies in 1948. Initially calling the new company "Ruda" (Rudolf Dassler), it was soon changed to its present name of Puma.[9] Puma is the native Quechua word for cougar, from there it went into German as well as other languages, such as English, Spanish, French, Russian, Romanian, Portuguese, Italian, Polish, Czech, Bulgarian, Swedish, Danish, Norwegian, Finnish, Bosnian, Croatian, Serbian, Slovene and Hungarian.

[Ans] According to recent archaeological studies, what ancient Roman weapon could rival the destructive power of modern firearms?

Step 1 : Introduction to the question "According to recent archaeological studies, what ancient Roman weapon could rival the destructive power of modern firearms?"

(Such guerrilla groups included the Irish Republican Army)Slingshots have been used as military weapons, but primarily by guerrilla forces due to the primitive resources and technology required to construct one.