The United States armed forces have limited capabilities for fast deployment times, essential to face emerging national security threats where the use of military force would be required。Assuming reasonable proximity and warning, it is possible to deploy a Marine Expeditionary Unit(MEU)，of regimental size, in about 2 to 4 days.
It is also possible to airlift a brigade of the
82" a Airborne Division in about 4 days。
