After leaving Apple River Fort, being well supplied with provisions, the Indians moved leisurely toward the fort at Kellogg's Grove, with the intention of taking it, as scouts had come in and reported that it was not very strongly garrisoned on the day previous to their arrival on the 23d of June. At this time the Illinois troops were rendez-voused at a place known as Fort Wilbourn on the Illinois river, at or near where now stands the city of LaSalle. What was then called the new levy, after Stillman's defeat, were assembled there, numbering about three thousand men, being formed into military organizations consisting of three brigades. The first brigade was commanded by Gen. Alexander Posey. The second by Gen. M. K. Alexander, and the third by Gen. James D. Henry. Major John Dement, of Vandalia, was elected to the command of a spy battalion composed of three companies. Gen. Atkinson, of the United States Regulars, commanding, while these organizations were progressing. The Indians had made a raid on Bureau creek, situated between the Illinois and Rock rivers. John Dement had been chosen major by the members of three companies of Gen. Posey's brigade, which was a spy battalion. The Major's battalion being ready for duty when the news reached the fort of the attack upon the settles on Bureau creek, it was ordered to march at once to the scene of danger for protection of the settlers, and to discover and watch the movements of the Indians, if possible. The Major was ordered to scour the country through to Rock river, and then to report to Col. Zackary Taylor, who commanded a small force of United States troops at a small fortification at Dixon's Ferry on Rock river.