[Smirnoff]

"When Johnny Comes Marching Home Again" is a popular song from the American Civil War that expressed people's longing for the return of their friends and relatives who were fighting in the war.
The lyrics to "When Johnny Comes Marching Home" were written by the Irish-American bandleader Patrick Gilmore during the American Civil War. Its first sheet music publication was deposited in the Library of Congress on September 26, 1863, with words and music credited to "Louis Lambert"; copyright was retained by the publisher, Henry Tolman & Co., of Boston.