America entered World War I quite late in the conflict (1917). Having never “officially” deployed in such large numbers overseas before, The US Army had studied European weapons, uniforms and tactics for several years prior. It had already been “proven” that the bright and showy colors of European Armies were not suited to the “Modern” type of warfare that was developing. Indeed, The British Army quickly incorporated the “Olive Drab” (OD) and Khaki as it's principle colors in the battlefield. Soon, most Armies involved began to develop a darker earthier color scheme. The reasoning was quite simple. Soldiers needed to blend into their battlefield environment. Tans, Dark Greens, Browns and Dark Grays were all becoming the “norm” (and would for many years). American Forces adopted a Dark Brown and Green (Wool) color scheme for their principle uniform. Coat and breaches, augmented with booties secured with Gautiers or Putees – The American Soldier also was issued the iconic “Campaign Hat” A high crowned hat with a wide circular brim, this hat still continues today as a symbol of the Modern US Armed Forces Drill Instructor. The Average solder was also equipped with “new” Load Bearing gear, which made the carrying of equipment and supplies a bit easier. Cartridge belt with clip holders, portable shovel and blanket – The American Soldier was issued everything he needed in the field. This initial uniform would remain the standard (although somewhat modified), until the mid to late 1950s.