Division (military)
From RTRWIKI
A division is a term utilized by the United States Military. A division is commanded by a Major General, consists of approximatelly 10,000 to 15,000 soldiers, and generally consists of 3 elements, each the size of a brigade. The division is able to conduct sustained battles and conducts large-scale tactical operations for the corps.
RTR also utilizes a Major General within its ranks.