“When Freedom from her mountain height
Unfurled her standard to the air,
She tore the azure robe of night,
And set the stars of glory there.”

- Joseph Rodman Drake, The American Flag
 (17 Aug 1795 - 21 Sept 1820)

The song was first publicly performed on February 6, the play's opening night, at Herald Square Theater in New York City. "You're a Grand Old Flag" quickly became the first song from a musical to sell over a million copies of sheet music.^{[citation needed]} The title and first lyric comes from someone Cohan once met; the Library of Congress website notes:

The original lyric for this perennial George M. Cohan favorite came, as Cohan later explained, from an encounter he had with a Civil War veteran who fought at Gettysburg. The two men found themselves next to each other and Cohan noticed the vet held a carefully folded but ragged old flag. The man reportedly then turned to Cohan and said, "She's a grand old rag." Cohan thought it was a great line and originally named his tune "You're a Grand Old Rag." So many groups and individuals objected to calling the flag a "rag," however, that he "gave 'em what they wanted" and switched words, renaming the song "You're a Grand Old Flag."^[1]

— Library of Congress

In the play itself, the scene with the Civil War soldier was replicated. The soldier's comment was the lead-in to this song. Thus the first version of the chorus began, "You're a grand old rag / You're a high-flying flag". Despite Cohan's efforts to pull that version, some artists such as Billy Murray had recorded it under its original title, "The Grand Old Rag", in advance of the play's opening, and copies under that title still circulate among collectors.....

   SAD GIGGLES! Thanks, George!