"American forces in Iraq are in danger of having their line of supply cut by guerrillas. Napoleon once said that "an army travels on its stomach." By that he meant that the problem of keeping an army supplied is the prerequisite for the very existence of the force.
A 21st-century military force "burns up" a tremendous volume of expendable supplies and continuously needs repairs to equipment as well as medical treatment. Without a plentiful and dependable source of fuel, food, and ammunition, a military force falters. First it stops moving, then it begins to starve, and eventually it becomes unable to resist the enemy. " Lang