which vehicle do they use?
M1A2 Abrams, M2A3 Bradley,  Stryker, AH-64 Apache attack helicopter
United States Army
U.S. Army doctrine puts a premium on mechanized warfare. It fields the highest vehicle-to-soldier ratio in the world as of 2009. The army's most common vehicle is the High Mobility Multipurpose Wheeled Vehicle (HMMWV), commonly called the Humvee, which is capable of serving as a cargo/troop carrier, weapons platform and ambulance, among many other roles. While they operate a wide variety of combat support vehicles, one of the most common types centers on the family of HEMTT vehicles. The M1A2 Abrams is the army's main battle tank, while the M2A3 Bradley is the standard infantry fighting vehicle. Other vehicles include the Stryker, the M113 armored personnel carrier and multiple types of Mine Resistant Ambush Protected (MRAP) vehicles.
The U.S. Army's principal artillery weapons are the M109A6 Paladin self-propelled howitzer and the M270 Multiple Launch Rocket System (MLRS), both mounted on tracked platforms and assigned to heavy mechanized units.

While the United States Army Aviation 
what short stories did edgar allan poe write MS. Found in a Bottle was he in military? Yes - he was in the United States Army as a private on May 27, 1827 what are some of the components of the us army? Regular Army, the Army Reserve and the Army National Guard does it have special forces? Yes - 1st Special Forces Group (Airborne), 3rd Special Forces Group (Airborne), 5th Special Forces Group (Airborne)
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United States Army [SEP] Vehicles
U.S. Army doctrine puts a premium on mechanized warfare. It fields the highest vehicle-to-soldier ratio in the world as of 2009. The army's most common vehicle is the High Mobility Multipurpose Wheeled Vehicle (HMMWV), commonly called the Humvee, which is capable of serving as a cargo/troop carrier, weapons platform and ambulance, among many other roles. While they operate a wide variety of combat support vehicles, one of the most common types centers on the family of HEMTT vehicles. The M1A2 Abrams is the army's main battle tank, while the M2A3 Bradley is the standard infantry fighting vehicle. Other vehicles include the Stryker, the M113 armored personnel carrier and multiple types of Mine Resistant Ambush Protected (MRAP) vehicles.