4.—On May the eleventh, 1940, you are in command of the 8th Division of the 19th Corps. You are at Frederick, Maryland, and you want your division to advance toward Gettysburg and to be a protection to your main army which is going to come through the passes of the mountains in that vicinity. You are going to remain in Frederick until half past eight the next morning, and then you are going to go and be with the advance guard at its head. You want your main body to begin to move out when the head is at the first railroad crossing north of the town, and at ten minutes to seven to follow a mile behind the advance guard which you are going to have march along the Emmitsburg Turnpike. The end of the column ought to be across the first railroad crossing north of the town at half past six in the morning. The enemy’s main army is near Baltimore and Washington. You have heard from pretty good sources that a part of his army is in such a condition that any immediate movement is rendered out of the question, though you have reliable word that one of his divisions and possibly more are in fit condition to move toward the frontier. Indeed they may have done so, for already your frontier is being observed by all sorts and kinds of small detachments of the enemy. You want your field trains to come along and get together north of the town as soon as all of the troops have got out. You want them to be divided into two sections and you want the first section to be about two miles in rear of the troops and the second section to come along after the first section with a two mile distance. Your main body in order of march will be, one section of the signal company, the first battalion of the fourth regiment of infantry, the first brigade of Field Artillery without its first battalion, all but the first battalion of the second brigade, all but one company of the first battalion of Engineers, Signal Company A without its detachment, the field artillery combat train, and three ambulance companies. You want the river crossings of the Monocacy and the roads, railroads, and in fact all approaches to them from the east to be especially observed by the Advance Guard. That body will consist of the first brigade, the first battalion of the first field artillery, Company A of the Engineers, the first Ambulance Company and the first section of the Signal Company, all under command of Brigadier General Bates. The first section of the field train will have the following order: field trains; one section of the supply column; one wagon company of artillery ammunition; and one wagon company of small arms ammunition. The second section: field hospitals, all but two wagon companies of the ammunition column; all but one section of the supply column; medical reserve; and pack trains. You are going to begin this whole march on the next day. Your independent cavalry, commanded by Colonel Fine, and consisting of the first regiment of Cavalry and one section of the Signal Company is