To get flour, wheat had to be taken from the stacks, threshed, and sent to the mills to be ground.

Wheat being scarce in this region, corn as a substitute had to be converted into meal by the same laborious process.

In addition, beef cattle had to be secured for the meat ration.
By hard work we soon accumulated a sufficient quantity of flour and corn meal to justify the resumption of our march on Springfield; at or near which point the enemy was believed to be awaiting us, and the order was given to move forward, the commanding general cautioning me, in the event of disaster, to let no salt fall into General Price's hands.

General Curtis made a hobby of this matter of salt, believing the enemy was sadly in need of that article, and he impressed me deeply with his conviction that our cause would be seriously injured by a loss which would inure so greatly and peculiarly to the enemy's benefit; but we afterward discovered, when Price abandoned his position, that about all he left behind was salt.
When we were within about eight miles of Springfield, General Curtis decided to put his troops in line of battle for the advance on the town, and directed me to stretch out my supply trains in a long line of battle, so that in falling back, in case the troops were repulsed, he could rally the men on the wagons.

I did not like the tactics, but of course obeyed the order.