第1歩兵師団_(アメリカ軍) 第1歩兵師団
The 1st Infantry Division is a combined arms division of the [[United States Army]], founded on 24 May 1917. It is the oldest continuously serving division in the Regular Army. It has seen continuous service since its organization in 1917 during [[World War I]]. It was officially nicknamed [b]"The Big Red One"[/b] after its [[unit patch|shoulder patch]] (see post #5662159). It is currently based at Fort Riley, Kansas.

Wikipedia page: "1st Infantry Division (United States)":[https://en.wikipedia.org/wiki/1st_Infantry_Division_(United_States)]
1st infantry division (us army)