Overview
Motorized infantry is infantry that is transported by trucks or other motor vehicles. It is distinguished from mechanized infantry, which is carried in armoured personnel carriers or infantry fighting vehicles, and from light infantry, which can typically operate autonomously from supporting elements and vehicles for relatively long periods and may be airborne.
Operations
As defined by the United States Army, motorization is "the use of unarmored wheeled vehicles for the transportation of combat units." Motorizing infantry is the first stage towards the mechanization of an army. Civilian trucks are often readily adaptable to military uses of transporting soldiers, towing guns, and carrying equipment and supplies. Motorization greatly increases the strategic mobility of infantry units, which would otherwise rely on marches or railroads. In practice, armies have found it advantageous to develop trucks to military specifications, such as all-wheel drive, to have vehicles that function reliably in extremes of weather and terrain.
Motorization provides no direct tactical advantage in small-unit combat, as trucks and jeeps are vulnerable to artillery and small arms fire. However, in larger battles, motorized infantry has an advantage in mobility allowing them to move to critical sectors of the battlefield faster, allowing better response to enemy movements, and the ability to outmaneuver the enemy.
The disadvantage of motorization is that fuel is critical; if motorized divisions run out of fuel, they may be required to abandon their vehicles.
From Wikipedia (CC BY-SA 4.0).