15 Sep 1914-4 Sep 1974. Tank battalion and combat command commander in World War II; 3rd Armored Division commander; commander of US Military Assistance Command, Vietnam, from 1968-72; and Chief of Staff of the US Army from 1972-4. M1.
Armored Infantry Vehicle. AIV is an obsolete US term for APC.
Atelier de Construction d'Issy-les-Moulineaux. ("Construction Workshop of Issy-les-Moulineaux." French.)
Armored Personnel Carrier. APCs, usually armed with machine guns, generally transport infantry to the battle and then the troops dismount to fight on their own.
Armor-Piercing, Capped, Ballistic Capped. Armor-piercing projectile that has a piercing cap installed over the projectile's nose to help prevent projectile break-up when encountering face-hardened armor. Since piercing caps were typically blunt, aerodynamic ballistic caps were then installed over the piercing caps. During World War II, the US did not nomenclaturally differentiate between APC and APCBC projectiles; e.g., the 76mm APC projectile M62 had a ballistic cap fitted as well.
Armor-piercing projectile that is smaller than the diameter of the gun's barrel. Sabots (French for "shoe") are placed around the projectile and fill the space between the projectile and barrel walls. Once the projectile clears the gun tube, the sabots fall away. APDS projectiles have a higher muzzle velocity than comparable full-bore projectiles.
Armor-piercing fin-stabilized discarding sabot
APDS projectile that is aerodynamically stabilized by fins rather than spinning.
The suspension designed by J. Walter Christie in the 1920s involved independently springing a vehicle's road wheels on tall vertical helical springs. The wheels were attached to swing arms which then connected to the springs. The springs required a tall double-walled hull, and they were placed in between the two hull layers. Many vehicles with Christie's suspension could drive on or off of their tracks, wheeled motion usually being powered by chains running from the sprockets or final drives. Among vehicles using variants of Christie's suspension were many British World War II-era cruiser tanks, and the Soviet BT series and T-34.
This type of suspension involved springing the road wheels on a bogie against each other with a horizontally-oriented volute spring.
Heavy Recovery Vehicle.
Horizontal Volute Spring Suspension.
This suspension transmits pressure from the road wheel arm to compress a volume of gas via hydraulic fluid from which the gas is separated by a piston. By pumping or draining fluid into the suspension, the road wheel can also be raised or lowered.
Armor-piercing projectile that has a dense tungsten core surrounded by a lightweight, aerodynamic metal body. The light weight of the projectile imparts a higher muzzle velocity, and this, along with the relatively small diameter of the piercing core, yields greater penetration compared to conventional projectiles, especially at shorter ranges since the lighter HVAP projectile will bleed off speed more quickly than a heavier conventional projectile.
Medical Communications for Combat Casualty Care. System to digitally capture medical treatment data in operational environments, leading to a comprehensive lifelong electronic medical record for personnel.
This suspension involved mounting the road wheels to a bogie in pairs on arms and pivoting them against a vertically mounted volute spring, which was typically protected from damage by the bogie frame.
As in M4A1(76)W Sherman. Wet ammunition stowage. In tanks with wet ammunition stowage, main gun ammunition was stored in double-walled boxes. In between the walls of the ammunition boxes was a mixture of water, antifreeze, and an anticorrosive agent. When the boxes were penetrated, the water delayed or eliminated the resulting ammunition fire, giving crews valuable time to escape. More importantly, the ammunition was moved from the tanks' sponsons to under the turret, a much safer place for ammunition storage.
Walker, Lieutenant General Walton Harris
3 Dec 1889-23 Dec 1950. US 3rd Armored Division and XX Corps commander during World War II, and Eighth Army commander in the Korean War. M41.