1917 Journal of the American Medical Association  
5. The upper of the boot should not compress the fore part of the foot in any way. The toecap should be stiff and deep enough to clear the toes and allow free movement inside the boot. This stiffening should run back on the inner side of the boot to a point behind the metatarsophalangeal joint of the great toe. 6. The boot should be long enough to allow the foot to extend to its full length when the soldier is carrying his pack and all his accouterments.
doi:10.1001/jama.1917.02590320078036 fatcat:746fcjiugbfoho6q7gxr2wigs4