On the 17th of March the army on the Tennessee River consisted of five
divisions, commanded respectively by Generals C. F. Smith, McClernand,
L. Wallace, Hurlbut and Sherman. General W. H. L. Wallace was
temporarily in command of Smith's division, General Smith, as I have
said, being confined to his bed. Reinforcements were arriving daily and
as they came up they were organized, first into brigades, then into a
division, and the command given to General Prentiss, who had been
ordered to report to me. General Buell was on his way from Nashville
with 40,000 veterans. On the 19th of March he was at Columbia,
Tennessee, eighty-five miles from Pittsburg. When all reinforcements
should have arrived I expected to take the initiative by marching on
Corinth, and had no expectation of needing fortifications, though this
subject was taken into consideration. McPherson, my only military
engineer, was directed to lay out a line to intrench. He did so, but
reported that it would have to be made in rear of the line of encampment
as it then ran. The new line, while it would be nearer the river, was
yet too far away from the Tennessee, or even from the creeks, to be
easily supplied with water, and in case of attack these creeks would be
in the hands of the enemy. The fact is, I regarded the campaign we were
engaged in as an offensive one and had no idea that the enemy would
leave strong intrenchments to take the initiative when he knew he would
be attacked where he was if he remained. This view, however, did not
prevent every precaution being taken and every effort made to keep
advised of all movements of the enemy.

Johnston's cavalry meanwhile had been well out towards our front, and
occasional encounters occurred between it and our outposts. On the 1st
of April this cavalry became bold and approached our lines, showing that
an advance of some kind was contemplated. On the 2d Johnston left