History of the United States Forest Service
Starting in 1876, and undergoing a series of name changes, the United States Forest Service of the Department of Agriculture grew to protect and use millions of acres of forest on public land. Gifford Pinchot, an early advocate of scientific forestry, along with President Theodore Roosevelt and conservation organizations, led the effort to manage forest for the public good.
Source: Wikipedia — History of the United States Forest Service (CC BY-SA 4.0)