Forces needed for Iran Invasion
This in my opinion would be the needed force set to invade Iran and take/hold Tehran. We are looking at a Three pronged invasion of 100,000+ troops with 760+ M1 Abrams, 740+ Bradley's, 250+ strykers AFV, 500+ LAV/LVTP, 1 force overland from Iraq, Amphibious landings near Bandar Abbas and force movement from Afghanistan towards Tehran.
U.S Army formations
1st Cavalry Div/100%
4th Infantry Div/100%
10th Mountain Div/100%
101st Airborne/air assault/100%
3rd Armoured Cav Rgt/100%
172nd Inf Brigade/100%
173rd Airborne Brigade/100%
82nd Airborne Div/1 brigade.....augmentative force of 2 Ranger Battalion
5th Special Forces Group/100%
10th Special Forces Group/Major elements
160 Special operation Aviation Reg/major elements
MARINE FORCES
1st Marine Div/100% attached SEALteams
3rd Marine Exp Brig/attached SEALteams
5th Marine Exp Brig/attached SEAL teams
Major Elements of Marine SOCOM.Force Recon
FOLLOW ON FORCES 100,000+ 60-90 days latter to occupy the rest of Iran as follows.
Follow on force of 82nd Airborne 1 brigade
7th National Guard Inf Div (light)
24th National Guard Inf Div (Heavy)
40th National Guard Inf Div(mechanized)
35th National Guard Inf Div(Mechanized)
155th National Guard armoured brigade
116th National Guard Armor Cavalry Brigade
Criminal Investigations Div. support U.S army(3rd MP Group)
89th Military Police brigade
1st Military Police brigade.
8th Military Police brigade
Major Elements of the 2nd Marine Div to replace 1st Marine Div as situation becomes better.
Delta units( Kill leaders of any Insurgancy before starts)
Major elements of CIA-special activities groups.(kill bad actors)
FBI-technical support for LEO ops. (track down bad actors)
Federal Protective Services police and U.S Marshal service(SOG)
Federal Bureau of Prisons special corrections units and Emergency response units)
Contractor Security units IE Blackwater/private armies to protect VIP/infrastructure.