The battle was tactically inconclusive and strategically irrelevant; neither side landed the blow they hoped to on the other, Washington's army remained an effective force in the field, and the British redeployed successfully to New York. Both sides sustained considerable casualties, though the majority were from heat-related illness and exhaustion rather than combat. The Continental Army is estimated to have inflicted more losses than it received, and it was one of the rare occasions on which it retained possession of a battlefield. It had proven itself to be much improved after the training it underwent over the winter, and the professional conduct of the American troops during the battle was widely noted by the British. Washington was able to present the battle as a triumph, and he was voted a formal thanks by Congress to honor "the important victory of Monmouth over the British grand army." His position as commander-in-chief became unassailable. He was lauded for the first time as the Father of his Country, and his detractors were silenced. Lee was vilified for his failure to press home the attack on the British rearguard. Because of his tactless efforts to argue his case in the days after the battle, Washington had him arrested and court-martialed on charges of disobeying orders, conducting an "unnecessary, disorderly, and shameful retreat" and disrespect towards the commander-in-chief. Lee made the fatal mistake of turning the proceedings into a contest between himself and Washington. He was found guilty on all counts, although his culpability on the first two charges was debatable.