Theodore O'Hara (February 11, 1820 - June 6, 1867) was a poet and an officer for the United States Army in the Mexican-American War, and a Confederate colonel in the American Civil War. He is best known for the poems The Bivouac of the Dead, which is quoted in many cemeteries, and The Old Pioneer.
The muffled drum's sad roll has beat
The soldier's last tattoo;
No more on life's parade shall meet
...