political. Fremont could do, and did, nothing at all, and to reinforce
him was sheer absurdity.[7] Against it McClellan protested almost
indignantly, but was "partially relieved by the President's positive and
emphatic assurance" that no more troops "should in any event be taken
from" him, or "in any way detached from [his] command."

Orders had been issued on February 27, to Mr. Tucker, assistant
secretary of war, to prepare means of transporting down the Potomac,
troops, munitions, artillery, horses, wagons, food, and all the vast
paraphernalia of a large army. He showed a masterly vigor in this
difficult task, and by March 17 the embarkation began. On April 2
McClellan arrived at Fortress Monroe. On the very next day he was
disturbed by the revocation of the orders which had left him in command
of that place and had allowed him to "draw from the troops under General
Wool a division of about 10,000 men, which was to be assigned to the
First Corps." Another and a serious disappointment also occurred at
once; he found that the navy could not be utilized for assisting in an
attack on Yorktown, or for running by it so as to land forces in rear of
it. He must therefore depend wholly upon his army to force a way up the
Peninsula. This he had stated to be an unsatisfactory alternative,
because it involved delay at Yorktown. Nevertheless, having no choice,
he began his advance on April 4. He had with him only 58,000 men; but
more were on the way, and McDowell's corps was to be brought forward to
join him as rapidly as transportation would permit. His total nominal
force was smaller than the minimum which, on February 3, he had named as
necessary; yet it was a fine body of troops, and he had lately said to
them: "The army of the Potomac is now a real army, magnificent in
material, admirable in discipline, excellently equipped and armed. Your
commanders are all that I could wish."