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 light utility vehicles are vulnerable to artillery and small arms fire.
There a Lieutenant George S. Patton was introduced to mechanized warfare when he led a small group of men against Villa's forces at San Miguelito Ranch.
[3][4] After the war, the major militaries of the world saw the great benefit that motorized vehicles could have on the logistics and combat effectiveness of their infantry units.
While it was no more robust than the regular infantry that moved on foot, its increased speed became decisive in the Blitzkrieg strategy, as it could follow the panzer forces and defend its flanks.
The motorization of armies required massive industrialization of the economies in order to meet the heavy cost for vehicle production, replacement parts, and fueling.
During the duration of the Humvee's use in Iraq and Afghanistan and before the roll-out of MRAPs, it slowly became more heavily armored with larger turret shields, bulletproof glass and extra plating on its doors and components.
Less armored but faster and lighter MRAPs were developed under the Joint Light Tactical Vehicle program, which is now phase in the Oshkosh L-ATV and M-ATV.