First performed by Cincinnati Symphony Orchestra, conducted by Aaron Copland (1943).
Hit version by Emerson, Lake & Palmer (UK #2 1970).
From the wiki: “‘Fanfare for the Common Man’ was written on request from Eugene Goossens, music director of the Cincinnati Symphony Orchestra, in response to the US entry into the Second World War. During the First World War, the Cincinnati orchestra had asked British composers for a fanfare to begin each orchestral concert. It had been so successful that Goossens thought to repeat the procedure in World War II but with American composers.
“In 1942, Copland was commissioned by Goossens to write the fanfare. Copland recalled he was inspired by a speech US Vice President Henry A. Wallace had given that spring at the Free World Association in New York City:
“‘Some have spoken of the American Century,’ Wallace proclaimed. ‘I say that the century on which we are entering, the century which will come out of this war, can be and must be the century of the common man.’