The Army established Camp Sheridan ( Fort Yellowstone ) at Mammoth Hot Springs as park headquarters .
The Army developed systems for conservation and resource management between 1886 and 1916 that served as foundations for the National Park Service , created in 1916 .
The Army established Camp Sheridan ( Fort Yellowstone ) at Mammoth Hot Springs as park headquarters and developed systems for conservation and resource management between 1886 and 1916 that served as foundations for the National Park Service , created in 1916 .