skos:altLabel | - 1st
- First
- 1st United States
- 2nd Infantry
- Infantry Regiment
- 1st Infantry Regiment
- 1st Infantry
- 1st Infantry Battalion
- 1st Regiment of Infantry
- 3rd U.S. Infantry Regiment
- 2nd Battalion, 1st Infantry
- First Infantry
- First Infantry Regiment
- 1st (Patton's) Infantry
- 1st Battalion, 1st Infantry Regiment (1–1 INF)
- 1st Battalion, Infantry
- 1st Infantry's
- 1st Regiment Heavy Artillery U.S. Colored Troops
- 1st Regiment Infantry U.S. Colored Troops
- 1st Regiment U.S. Infantry
- 1st U.S. Infantry
- 1st U.S. Infantry Regiment
- 1st US Infantry
- 1st US Infantry Regiment
- 1st United States Infantry
- 1st United States Infantry (siege guns)
- 2-1 IN
- 2/1 Battalion
- 2nd Battalion, 1st Infantry Regiment
- 3rd Battalion, 1st Infantry
- 3rd Battalion, 1st Infantry Regiment
- 7th U.S. Infantry
- First United States Infantry
- Second Infantry Regiment
- The Second Regiment of Infantry
- second regiment
|