Question: Is the 72nd field brigade part of the oldest or newest established field army?
Sentence (from "157th Maneuver Enhancement Brigade"): It was formerly known as the 57th Field Artillery Brigade, at which time its subordinate organizations included the 1st Battalion, 126th Field Artillery Regiment and the 1st Battalion, 121st Field Artillery Regiment from the Wisconsin Army National Guard, plus the 1st Battalion, 182nd Field Artillery Regiment of the Michigan Army National Guard.
Relevant evidence: No