The loss of the Americans in the battle of Monmouth was 8 officers and 61 privates killed, and about 160 wounded. Among the slain were Lieutenant-Colonel Bonner, of Pennsylvania, and Major Dickinson, of Virginia, both of whom were much regretted. One hundred and thirty were missing, but a considerable number of these afterward rejoined their regiments.
In his official letter, Sir Henry Clinton states his dead and missing at 4 officers and 184 privates; his wounded, at 16 officers and 154 privates. This account, so far as it respects the dead, cannot be correct, as 4 officers and 245 privates were buried on the field by persons appointed for the purpose, who made their report to Washington; and some few were afterward found, so as to increase the number to nearly 300. The uncommon heat of the day proved fatal to several on both sides.
As usual, when a battle has not been decisive, both parties claimed the victory. In the early part of the day the advantage was certainly with the British; in the latter part it may be pronounced with equal certainty to have been with the Americans. They maintained their ground, repulsed the enemy, were prevented only by the night and by the retreat of the hostile army from renewing the action, and suffered less in killed and wounded than their adversaries.
It is true that Sir Henry Clinton effected what he states to have been his principal object—the safety of his baggage. But when it is recollected that the American officers had decided against hazarding an action, that this advice must have trammeled the conduct and circumscribed the views of Washington, he will be admitted to have effected no inconsiderable object in giving the American arms that appearance of superiority which was certainly acquired by this engagement.
Independent of the loss sustained in the action, the British army was considerably weakened in its march from Philadelphia to New York. About 100 prisoners were made, and near 1,000 soldiers, chiefly foreigners, deserted while passing through Jersey. Many of the soldiers had formed attachments in Philadelphia, which occasioned their desertion. Clinton's whole loss, including killed, wounded, prisoners, and deserters, amounted to at least 2,000 men.
The conduct of Lee was generally disapproved. As, however, he had possessed a large share of the confidence and good opinion of the Commander-in-Chief, it is probable that explanations might have been made which would have rescued him from the imputations that were cast on him, and have restored him to the esteem of the army, could his haughty temper have brooked the indignity he believed to have been offered him on the field of battle. Washington had taken no measures in consequence of the events of that day, and would probably have come to no resolution concerning them without an amicable explanation, when he received from Lee a letter expressed in very unbecoming terms, in which he, in the tone of a superior, required reparation for the injury sustained "from the very singular expressions" said to have been used on the day of the action by Washington.
This letter was answered (July 30, 1778) by an assurance that, so soon as circumstances would admit of an inquiry, he should have an opportunity of justifying himself to the army, to America, and to the world in general; or of convincing them that he had been guilty of disobedience of orders and misbehavior before the enemy. On his expressing a wish for a speedy investigation of his conduct, and for a court-martial rather than a court of inquiry, he was arrested—first, for disobedience of orders in not attacking the enemy on the 28th of June, agreeably to repeated instructions; secondly, for misbehavior before the enemy on the same day, in making an unnecessary, disorderly, and shameful retreat; and thirdly, for disrespect to the Commander-in-Chief in two letters.
Before this correspondence had taken place, strong and specific charges of misconduct had been made against General Lee by several officers of his detachment, and particularly by Generals Wayne and Scott. In these, the transactions of the day, not being well understood, were represented in colors much more unfavorable to Lee than facts, when properly explained, would seem to justify.
These representations, most probably, induced the strong language of the second article in the charge. A court-martial, over which Lord Stirling presided, after a tedious investigation, found him guilty of all the charges exhibited against him, and sentenced him to be suspended for one year. This sentence was afterward, though with some hesitation, approved almost unanimously by Congress. The court, softened in some degree the severity of the second charge, by finding him guilty, not in its very words, but "of misbehavior before the enemy, by making an unnecessary, and, in some few instances, a disorderly retreat."
Lee defended himself with his accustomed ability. He proved that, after the retreat had commenced, in consequence of General Scott's repassing the ravine, on the approach of the enemy, he had designed to form on the first advantageous piece of ground he could find; and that in his own opinion, and in the opinion of some other officers, no safe and advantageous position had presented itself until he met Washington, at which time it was his intention to fight the enemy on the very ground afterwards taken by Washington himself. He suggested a variety of reasons in justification of his retreat, which, if they do not absolutely establish its propriety, give it so questionable a form as to render it probable that a public examination never would have taken place, could his proud spirit have stooped to offer explanation instead of outrage to the Commander-in-Chief.