"Now that you are in the position, I wish you to undo nothing merely because General Curtis or Governor Gamble did it, but to exercise your own judgment and do right for the public interest.
"Let your military measures be strong enough to repel the invader and keep the peace, and not so strong as to unnecessarily harass and persecute the people. It is a difficult rôle, and so much greater will be the honor if you perform it well. If both factions, or neither, shall abuse you, you will probably be about right. Beware of being assailed by one and praised by the other.
"Yours truly,
"A. Lincoln."
In acknowledging the President's letter on June 1, I concluded by saying:
"I have strong hopes that the Missouri State Convention, at its approaching session, will adopt such measures for the speedy emancipation of slaves as will secure the acquiescence of the large majority of Union men, though perhaps not quite satisfactory to either extreme. If this hope be realized, one of my most embarrassing difficulties will be removed, or at least greatly diminished."
The military problem in that department, as understood by me and by my superiors in Washington, was at that time a comparatively simple one, though my predecessor in command of the department entertained different views. With my views of the military situation, whether confined to my own department or extended to embrace the entire country, there was but one course to pursue, namely, to send all available forces to assist in the capture of Vicksburg and the opening of the Mississippi to the gulf. After that I could easily operate from points on the Mississippi as a base, capture Little Rock and the line of the Arkansas, and then make that river the base of future operations.
Hence, in response to a request from General Halleck, I at once sent to General Grant and other commanders at the front all the troops I could possibly spare, saying at the same time that this would leave me very weak, but that I was "willing to risk it in view of the vast importance of Grant's success."
Thus I began my military operations by stripping the department of troops to the lowest possible defensive limit. But this was what I had so earnestly urged before, when in a subordinate position; and I was glad to do it when the responsibility rested upon me. My loss of troops to Grant was returned with interest as soon as practicable after Vicksburg had fallen, and I was then able to advance a large force, under General Steele, for the capture of Little Rock, resulting in holding the entire line of the Arkansas River from that time forward.
At the time I had met General Grant but once, and then only for a moment, and I have always assumed that the timely aid sent him at Vicksburg was the foundation for the kind and generous friendship and confidence which he ever afterward manifested toward me, and which, with the like manifestations of approval from President Lincoln, are to me the most cherished recollections of my official career.