Since 1974, the 101st Airborne Division has been the United States Army's "Air Assault" Division. The Division is capable of lifting, by helicopter, a 4,000-soldier combined arms force up to 150 kilometers behind enemy lines in one lift. Having approximately 281 helicopters, including three battalions of Apache attack helicopters, makes the "Screaming Eagles" the most versatile fighting unit in the Army.

A Summary History of the 4th Infantry Division, whose motto is "Steadfast and Loyal," is a heavy mechanized division in the United States Regular Army. The 4th ID has a storied history from WWI, WWII, Vietnam, and Operation Iraqi Freedom. Arguably the most modernized division in the army, the 4ID is currently organized with four Brigade Combat Teams (BCT), a fires brigade, an aviation brigade, and various supporting units.