Further, we have a discrepancy between the story of this retreat by the ford and the known order of battle arranged the day before. In that order of battle he put in the first line, just behind his archers, who lined the hedge bounding the vineyards, a group of men-at-arms under Warwick and Oxford. He himself commanded the body just behind these, and the third or rearmost line was under the command of Salisbury and Suffolk.
How are these contemporary and yet contradictory accounts to be reconciled? What was the real meaning of movement on the ford?
I beg the reader to pay a very particular attention to the mechanical detail which I am here examining, because it is by criticism such as this that the truth is established in military history between vague and apparently inconsistent accounts.
If you are in command of a force such as that indicated upon the following plan, in which A and B together form your front line, C your second, and D your third, all three facing in the direction of the arrow, and expecting an attack from that direction; and if, after having drawn up your men so, you decide there is to be no attack, and determine to retreat in the direction of X, your most natural plan will be to file off down the line towards X, first with your column D, to be followed by your column C, with A and B bringing up the rear. And this would be all the more consonant with your position, from the fact that the very men A and B, whom you had picked out as best suited to take the first shock of an action, had an action occurred, would also in the retreat form your rearguard, and be ready to fight pursuers should a pursuit develop and press you. That is quite clear.
Now, if, for reasons of internal organisation or what not, you desired to keep your vanguard still your vanguard in retreat, as it was on the field, your middle body still your middle body on the march, and what was your rearguard on the field still your rearguard in the long column whereby you would leave that field, the manœuvre by which you would maintain this order would be filing off by the left; that is, ordering A to form fours and turn from a line into a column, facing towards the point E, and, having done so, to march off in the direction of X. You would order B to act in the same fashion next. When A and B had got clear of you and had reached, say, F, you would make C form fours and follow after; and when C had marched away so far as to leave things clear for D, the last remaining line, you would make D in its turn form fours and close up the column.
Now, suppose the Black Prince had been certain on that Monday morning that there would be no attack, nor even any pursuit. Suppose that he were so absolutely certain as to let him dispense with a rearguard—then he might have drawn off in the second of the two fashions I have mentioned. Warwick and Oxford (A and B) would have gone first, C (the Black Prince, in the centre) would have gone next, and Salisbury, D, would have closed the line of the retreat. This would have been the slowest method he could have chosen for getting off the field, it would have had no local tactical advantage whatsoever, and to adopt such a method in a hurried departure at dawn from the neighbourhood of a larger force with whom one had been treating for capitulation the day before, would be a singular waste of time in any case. But, at any rate, it would be physically possible.
What is quite impossible is that such a conversion and retirement should have been attempted; for we know that a strong rearguard was left, and held the entrenchments continuously.
To leave the field in the second fashion I have described is mathematically equivalent to breaking up your rearguard and ceasing to maintain it for the covering of your retreat. It is possible only if you do not intend to have a rearguard at all to cover your retirement, because you think you do not need it. As a fact, we know that all during the movement, whatever it was, a great body of troops remained on the field not moving, and watching the direction from which the French might attack. So even if there was a beginning of retirement, a strong rearguard was maintained to cover that movement. We further know that the Black Prince and the man who may be called chief of his staff, Chandos, planned to keep that very strong force in position in any case, until the retirement (if retirement it were) was completed; and we further know that the fight began with a very stout and completely successful resistance by what must have been a large body posted along the ridge, and what even the one account which speaks of the retirement describes as the bulk of the army.
To believe, then, that Warwick filed off by the left, followed by the vehicles, and then by the main command under the Prince, and that all this larger part of the army, including its wheeled vehicles, had got across the ford before contact took place and an action developed, is impossible. It is not only opposed to any sound judgment, it is mathematically impossible. It also conflicts with the use of a park of vehicles to defend the left of the entrenched line, and with the natural use of the line of retreat by Nouaillé. I can only conclude that what really happened was something of this sort: