Patrick Sarsfield Gilmore was an Irish-born American composer and military bandmaster who lived and worked in the United States after 1848. While serving in the Union Army during the U.S. Civil War, Gilmore wrote the lyrics to the song "When Johnny Comes Marching Home". This was published under the pseudonym Louis Lambert in September 1863.

The World's Peace Jubilee and International Musical Festival of 1872 took place in the Back Bay area of Boston, Massachusetts. Patrick Sarsfield Gilmore directed the festival, which lasted some 18 days. The jubilee honored the ending of the Franco-Prussian War.