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The History of Backpack Invention of backpack was back than was very important as it eased the process of carrying things from one place to another.Years ago,hikers struggled under cumbersome,ill-fittings packs.This made the hours spent traipsing through the woods spent traipsing through the woods miserable. Over time, pack technology has gotten better. Let’s take a look. 1878: Merriam Knapsack Henry Miriam developed one of the first functional knapsacks for the U.S. military. He used sheet metal in order to reduce the weight that had to be carried around during missions. 1914: Haversacks The start of World War I brought the need for improved military backpacks called Haversacks. These bags strapped on the upper and lower back and held ammo, canteens, and other equipment for the U.S. military. 1922:Trapper Nelson Lloyd F. Nelson designed a backpack with a rigid frame for hiking that he called the Trapper Nelson. The original bag was carried along for his