1780.
While the public mind was anticipating great events from the combined arms of France and America, treason lay concealed in the American camp, and was plotting the ruin of the American cause.
The great services and military talents of General Arnold, his courage in battle, and patient fortitude under excessive hardships, had secured to him a high place in the opinion of the army and of his country.
Not having sufficiently recovered from the wounds received before Quebec and at Saratoga to be fit for active service, and having large accounts to settle with the government which required leisure, he was, on the evacuation of Philadelphia in 1778, appointed to the command in that place.
Unfortunately, that strength of principle and correctness of judgment, which might enable him to resist the various seductions to which his fame and rank exposed him in the metropolis of the Union, were not associated with the firmness which he had displayed in the field, and in the most adverse circumstances. Yielding to the temptations of a false pride, and forgetting that he did not possess the resources of private fortune, he indulged in the pleasures of a sumptuous table and expensive equipage, and soon swelled his debts to an amount which it was impossible to discharge. Unmindful of his military character, he engaged in speculations which were unfortunate; and with the hope of immense profit, took shares in privateers which were unsuccessful. His claims against the United States were great, and he looked to them for the means of extricating himself from the embarrassments in which his indiscretions had involved him; but the commissioners to whom his accounts were referred for settlement, had reduced them considerably; and, on his appeal from their decision to congress, a committee reported that the sum allowed by the commissioners was more than he was entitled to receive.
He was charged with various acts of extortion on the citizens of Philadelphia, and with peculating on the funds of the continent. Not the less soured by these multiplied causes of irritation, from the reflection that they were attributable to his own follies and vices, he gave full scope to his resentments, and indulged himself in expressions of angry reproach against, what he termed, the ingratitude of his country, which provoked those around him, and gave great offence to congress. Having become peculiarly odious to the government of Pennsylvania, the Executive of that state exhibited formal charges against him to congress, who directed that he should be arrested and brought before a court martial. His trial was concluded late in January, 1779, and he was sentenced to be reprimanded by the Commander-in-chief. This sentence was approved by congress and carried into execution.
From the time the sentence against him was approved, if not sooner, his proud unprincipled spirit revolted from the cause of his country, and determined him to seek an occasion to make the objects of his resentment, the victims of his vengeance. Turning his eyes on West Point as an acquisition which would give value to treason, and inflict a mortal wound on his former friends, he sought the command of that fortress for the purpose of gratifying both his avarice and his hate.[42]
To New York, the safety of West Point was peculiarly interesting; and, in that state, the reputation of Arnold was particularly high. To its delegation he addressed himself; and one of its members had written a letter to General Washington, suggesting doubts respecting the military character of Howe, to whom its defence was then entrusted, and recommending Arnold for that service. This request was not forgotten. Some short time afterwards, General Schuyler mentioned to the Commander-in-chief a letter he had received from Arnold intimating his wish to join the army, but stating his inability, in consequence of his wounds, to perform the active duties of the field. General Washington observed that, as there was a prospect of a vigorous campaign, he should be gratified with the aid of General Arnold. That so soon as the operations against New York should commence, he designed to draw his whole force into the field, leaving even West Point to the care of invalids and a small garrison of militia. Recollecting however the former application of a member of congress respecting this post, he added, that "if, with this previous information, that situation would be more agreeable to him than a command in the field, his wishes should certainly be indulged."
This conversation being communicated to Arnold, he caught eagerly at the proposition, though without openly discovering any solicitude on the subject; and, in the beginning of August, repaired to camp, where he renewed the solicitations which had before been made indirectly.
At this juncture, Sir Henry Clinton embarked on an expedition he meditated against Rhode Island, and General Washington was advancing on New York. He offered Arnold the left wing of the army, which that officer declined under the pretexts mentioned in his letter to General Schuyler.