10.—Major Quincy, in charge of the artillery battalion of the preceding problem, assembles the captains of his batteries and issues his instructions covered by the following data: he wishes Batteries A and B to attack the hostile artillery, and he wishes them to take up a position on the north end of the field near where the brigade is halted. He wants Battery C to go to Hill 592. From that point he wants that Battery to attack the hostile infantry. He gives to his commanders the information which was contained in the aeroplane message of the preceding problem. He also states that the enemy in superior force is attacking from the west. He points out also that between 3,000 and 4,000 yards to the southwest can be seen a long line of artillery of the enemy and that this artillery is in action. He also states that the first battalion of the first infantry, which is now marching down the road, which is the support of the artillery, will occupy Hill 592. Battery A’s target is to be the further half of the line of the enemy’s guns, and Battery B’s target is to be the nearer half. He states to his Battery Commanders that he has already marked the position that they are to occupy with their commands, and he tells them that they are to occupy this position at once and prepare for immediate action. He tells Battery A that the adjutant will give them the firing data and they are to range by volleys. They are to report to him when ready, and they are to be on the alert and await his order to commence firing. He also states that the advance cavalry is on the Hill 651 south of Goldenville, and that they are covering the right of the line. He wishes to tell his battery commanders that the infantry is marching in a general direction south, and that it is going from here to begin an attack against the left of the enemy. He wishes to tell them also that he is to be, during the action, on the left of Battery A. CHAPTER X THE OPERATION ORDER, ORDERS, LETTERS OF INSTRUCTION Before August, 1914, the _Operation order_ was the English term for our _Field order_. Both orders had the same functions and about the same form. At times, the term _operation order_ was used by us to include only battle orders, but on the whole, the terms _Operation orders_ and _Field orders_ practically amounted to American and English designations of the same thing.