High Quality Content by WIKIPEDIA articles! The United States National Park Service, often referred to as the USNPS, or just NPS, is run by the United States Department of Interior, and is charged with protecting, preserving, and interpreting the nation's national parks. While the first national park, Yellowstone, was created in 1872, the National Park Service itself has only existed since 1916. There was no unifying dress for park officials across the nation until the United States Army Cavalry took over the protection of the parks, bringing to the parks the first real uniforms; until this happened in 1886, the clothing for officials was as varied as the individuals themselves. For nearly a century since it was officially established, the USNPS underwent several major uniform changes, although several uniform items, such as the distinctive campaign hat, are carry-overs from the early days. Eventually, the uniform became the easily recognizable gray shirt and green trousers that can...