1933: Civilian Conservation Corps established

(Wikipedia) The Civilian Conservation Corps (CCC) was a public work relief program for unemployed men, providing vocational training through the performance of useful work related to conservation and development of natural resources in the United States from 1933 to 1942. As part of the New Deal legislation proposed by U.S. President Franklin D. Roosevelt (FDR), the CCC was designed to aid relief of the unemployment resulting from the Great Depression while implementing a general natural resource conservation program on federal, state, county and municipal lands in every U.S. state, including the territories of Alaska, Hawaii, Puerto Rico, and the U.S. Virgin Islands.
The CCC became one of the more popular New Deal programs among the general public, providing economic relief, rehabilitation and training for a total of 3 million men. The CCC also provided a comprehensive work program that combined conservation, renewal, awareness and appreciation of the nation's natural resources. Continued

Image: "CCC (Civilian Conservation Corps) boys at work, Prince George's County, Maryland" (Carl Mydans/Library of Congress).