d and forage by ordinary wagons would have
required thirty-six thousand eight hundred wagons of six mules
each, allowing each wagon to have hauled two tons twenty miles each
day, a simple impossibility in roads such as then existed in that
region of country. Therefore, I reiterate that the Atlanta
campaign was an impossibility without these railroads; and only
then, because we had the men and means to maintain and defend them,
in addition to what were necessary to overcome the enemy.
Habitually, a passenger-car will carry fifty men with their
necessary baggage. Box-cars, and even platform-cars, answer the
purpose well enough, but they, should always have rough
board-seats. For sick and wounded men, box-cars filled with straw
or bushes were usually employed. Personally, I saw but little of
the practical working of the railroads, for I only turned back once
as far as Resaca; but I had daily reports from the engineer in
charge, and officers who came from the rear often explained to me
the whole thing, with a description of the wrecked trains all the
way from Nashville to Atlanta. I am convinced that the risk to
life to the engineers and men on that railroad fully equaled that
on the skirmish-line, called for as high an order of courage, and
fully equaled it in importance. Still, I doubt if there be any
necessity in time of peace to organize a corps specially to work
the military railroads in time of war, because in peace these same
men gain all the necessary experience, possess all the daring and
courage of soldiers, and only need the occasional protection and
assistance of the necessary train-guard, which may be composed of
the furloughed men coming and going, or of details made from the
local garrisons to the rear.

For the transfer of large armies by rail, from one theatre of
action to another by the rear--the cases of the transfer of the
Eleventh and Twelfth Corps--General Hooker, twenty-three thousand
men--from the East to Chattanooga, eleven hundred and ninety-two
miles in seven days, in the fall of 1863; and that of the Army of
the Ohio--General Schofield, fifteen thousand men--from the valley
of the Tennessee to Washington, fourteen hundred miles in eleven
days, en route to North Carolina in January, 1865, are the best
examples of which I have any knowledge, and reference to these is
made in the report of the Secretary of War, Mr. Stanton, dated
November 22, 1865.

Engineer troops attached to an army are