Question: What is the official nickname of the division of the United States Army that Francis Marshall served in?
Sentence (from "Raymond F. Chandler"): He has served in the 1st Infantry Division (FWD), 2nd Infantry Division, 4th Infantry Division, 1st Cavalry Division, 3rd Armored Division, 2nd Armored Cavalry Regiment, 3rd Armored Cavalry Regiment, United States Army Armor School, and the United States Army Sergeants Major Academy.
Relevant evidence: No