When Popular Science featured these soldiers on its May 1941 cover, U.S. riflemen carried state-of-the-art weapons for the era, such as the Garand semi-automatic rifle. Just as impressive was the load they carried: All of a soldier's equipment weighed only 57 pounds—33 pounds less than during World War I. Or as we put it then, "The modern infantry is no more like that of World War days than the rhumba is like the 1917 shimmy dance." Future soldiers (and dances) will be just as different, using exoskeletons and robotic mules to shoulder their burdens. Our feature story, The Weight Of War, details how modern technology is lightening soldiers' loads.