American Patriotic Song - You're a Grand Old Flag 

"You're a Grand Old Flag" is a patriotic American march written by George M. Cohan as a tribute to the U.S. flag. It was first performed on February 6, 1906, during the opening night of Cohan's stage musical George Washington, Jr. at the Herald Square Theater in New York City. The song incorporates snippets of other popular songs, including one of Cohan's own.
The original version of the chorus began with "You're a grand old rag," inspired by a comment made by a Civil War veteran who fought at Gettysburg, who held a ragged old flag. However, due to objections from many groups and individuals, Cohan changed the word "rag" to "flag" and renamed the song "You're a Grand Old Flag."
Despite Cohan's efforts to pull the original version, some artists recorded it under the title "The Grand Old Rag," and copies still circulate among collectors. Cohan's second attempt at writing the chorus began with "You're a grand old flag, though you're torn to a rag." The final version of the chorus is as follows:
"You're a grand old flag,
You're a high-flying flag,
And forever in peace may you wave.
You're the emblem of the land I love,
The home of the free and the brave.
Ev'ry heart beats true
'neath the Red, White and Blue,
Where there's never a boast or brag.
Should auld acquaintance be forgot,
Keep your eye on the grand old flag."
Today, many different arrangements of the song exist, and Paul V. Yoder's 1954 arrangement is commonly used by the U.S. military in its performances of the song. "You're a Grand Old Flag" quickly became one of the most popular U.S. marching-band pieces of all time and was the first song from a musical to sell over a million copies of sheet music.