McClernand's and Lew Wallace's divisions were styled the reserve, to be commanded by McClernand.

General Grant was substantially left out, and was named "second in command," according to some French notion, with no clear, well-defined command or authority.

He still retained his old staff, composed of Rawlins, adjutant-general; Riggin, Lagow, and Hilyer, aides; and he had a small company of the Fourth Illinois Cavalry as an escort.

For more than a month he thus remained, without any apparent authority, frequently visiting me and others, and rarely complaining; but I could see that he felt deeply the indignity, if not insult, heaped upon him.
General Thomas at once assumed command of the right wing, and, until we reached Corinth, I served immediately under his command.
We were classmates, intimately acquainted, had served together before in the old army, and in Kentucky, and it made to us little difference who commanded the other, provided the good cause prevailed.
Corinth was about thirty miles distant, and we all knew that we should find there the same army with which we had so fiercely grappled at Shiloh, reorganized, reenforced, and commanded in chief by General Beauregard in place of Johnston, who had fallen at Shiloh.

But we were also reenforced by Buell's and Pope's armies; so that before the end of April our army extended from Snake Creek on the right to the Tennessee River, at Hamburg, on the left, and must have numbered nearly one hundred thousand men.
Ample supplies of all kinds reached us by the Tennessee River, which had a good stage of water; but our wagon transportation was limited, and much confusion occurred in hauling supplies to the several camps.