1. Macomb's troop of cavalry will act as a screen, and will march about two miles in advance of the point of the advance-guard. The extent of the front to be covered by, and the disposition of the cavalry, will depend upon the nature of the country, and will be left to the judgment of the troop commander. He will communicate freely by means of orderlies with the commander of the advance-guard, who will at once transmit all messages to the commanding general. Three mounted orderlies, to be furnished by the troop, will march with the advance-guard.
2. Two companies of infantry, one platoon of artillery, and two Gatling guns will constitute the advance-guard. A pioneer detachment, consisting of one non-commissioned officer and eight men, to be carefully selected from the advance-guard, will march with the reserve, and will be under the direction of the engineer officer of the brigade. The requisite tools will be carried on a cart. Upon arriving in camp, the advance-guard will immediately establish the outpost.
