Thanks for the URL. The last time I was aware of the table of organization of mechanized infantry divisions, they had 6 batallions(Bn) of Bradley Fighting Vehicles, one of which may have been the division's cavalry squadron, and 5 battalions of Abrams tanks. This was allocated amongst the 3 brigade headquarters as needed, i.e. usually assigned to one brigade, but could be attached to another as needed. An armored division had one more armored(tank) batallion and one less Bradley(mechanized infantry) Bn.
With the current reorganization going on now, it's my understanding that each division will eventually have 4 maneuver brigades and an aviation brigade.
The 2ID's 1st Brigade(Bde) had the following units:
1-72 AR "First Tank", i.e. 1st Bn, 72nd Armored Regiment
2-72 AR "Dragon Force", i.e. 2nd Bn, 72nd Armored Regiment
2-9 IN (M) "Manchu", 2nd Bn, 9th Infantry Regiment(Mechanized)
Brigade Combat Team
1-15 FA "First to Fire", i.e. 1st Bn, 15th Field Artillery Regiment
2nd ENG Bn (Engineer)
302nd FSB "Iron Horse" (Forward Support Bn)
The 2nd Bde Units:
1-503 IN (AA), i.e. 1st Bn, 503rd Infantry Regiment(Air Assault)
1-506 IN (AA), i.e. 1st Bn, 506th Infantry Regiment(Air Assault)
1-9 IN, 1st Bn, 9th Infantry Regiment, i.e. unqualified straight leg infantry battalion
Long Range Surveillance Det
Brigade Combat Team
2-17 FA "Steel"
2nd FSB "Mustang"
44th ENG Bn
Battery B, 5th Bn, 5th ADA Rgt
The 3rd Bde units:
1-23 IN "Tomahawk" (straight leg infantry battalion)
2-3 IN (straight leg infantry battalion)
5-20 IN (straight leg infantry battalion)
1/14 CAV, i.e. 1st Squadron, 14th Cavalry Regiment
Brigade Combat Team
1-37 FA (T) (M198), N.B. (T) means towed, not self-propelled artillery as in a mechanized infantry division
168th ENG Bn
296th FSB
Charlie 5/5 ADA Bn
334th Signal Co.
18th EN Co.
209th MI Co.
C/52 Anti-Tank Co.
I suspect that the combat support and combat service support units of each brigade's combat team are assigned the way they appear to be, is more for administrative than tactical reasons, but I could be wrong. Each Bde appears to have at least an engineer Bn, which is unusual.
As for the 2ID's three manuever brigades:
The 1st Bde is an armored brigade, i.e. 2 tank battalions(Bn) and one mechanized infantry Bn.
The 2nd Bde is an air assault infantry Bde re-inforced with a straight leg Bn.
The 3rd Bde is an infantry Bde, i.e. 3 straight leg infantry battalions, not air assault qualified.
An old definition of a maneuver brigade was that it could be comprised of 2 to 7 maneuver battalions, those maneuver battalions are typically infantry or tank battalions, but never only tank battalions.
I don't know how well you understand how U.S. Army units are and were organized. This was also intended for those who don't.
The brigade going to Iraq from the 2ID will be a new Stryker Brigade, IIRC.
Any idea how those Strykers are performing? Are the vehicles doing the job well?
1-9 is one of two Bradley Fighting Vehicle-equipped battalions on the Korean peninsula.
I know it seems odd to brigade mechanized infantry with air mobile infantry, but Korea is an odd place. When I was in First Tank, our mech inf in the Iron Brigade was the Buffaloes, 1-17 IN, but the old 3rd Brigade had a mech inf bn at Camp Howze (I think), 1-31 IN. 1-9 was straight leg inf back then, at Camp Greaves.