A historical period of high unemployment in the United States was the Great Depression, which lasted from 1929 to the late 1930s.One of the key measures was the creation of public works programs, such as the Works Progress Administration (WPA) and the Civilian Conservation Corps (CCC), which provided jobs for millions of unemployed workers.The WPA focused on infrastructure projects, such as building roads, bridges, and public buildings, while the CCC focused on conservation efforts, such as planting trees and improving national parks.In conclusion, during the Great Depression, the US government implemented various measures to reduce unemployment, such as public works programs, social welfare programs, and labor protections.Additionally, the National Labor Relations Act (NLRA) of 1935, also known as the Wagner Act, was passed to protect the rights of workers to organize and bargain collectively with their employers.These programs were effective in reducing unemployment and providing much-needed infrastructure and conservation benefits to the country.