5,000 men entrained from Vicksburg for Camp Moore, led by Maj. Gen. John C. Breckinridge, on July 27. They were joined by a small infantry division led by Brig. Gen. Daniel Ruggles at the camp. Simultaneously, the "Arkansas" was sailing down the Mississippi River, en route to engage Union ships near Baton Rouge. The men had a significant amount of matériel, and were well fed. General Williams reportedly had word of the forces' departure from Camp Moore on July 28. On August 4, after information was again received of the imminent arrival of the enemy, Union troops were formed up a mile outside of Baton Rouge. The Union men at Baton Rouge were not experienced, and were in training camp for only two weeks before being sent to Baton Rouge. The troops had few supplies because most were in New Orleans, which was considered more important.