It can scarcely be necessary to inform your Excellency, that our military establishment for the present year consists of one regiment of artillery, four legionary, and two partisan corps, and fifty regiments of infantry, beside the corps of invalids; or that Congress have called in pointed terms upon each State to complete its regiments to the establishment, the aggregate of which, if complied with, would amount to thirtyfour thousand three hundred and eight men, exclusive of commissioned officers, sergeants, and music, Hazen's regiment, and the corps of invalids. Of this force, one legionary corps, two regiments of artillery, and twentytwo of infantry, besides Hazen's regiment and the invalids, compose the northern army; but as Hazen's regiment is fostered by no State, discouraged from recruiting by all, and without funds if the case were otherwise, it must soon dwindle to nothing, being now very weak. The present totality of the rank and file, exclusive of sergeants, of those regiments which compose the northern army, amounts to nine thousand one hundred and fortysix. From this number the sick men, in different branches of the staff department, and such as are employed on other extra duties, which the peculiarity of our circumstances compels me to furnish from the army, being deducted, will reduce the efficient operating force of these corps to seven thousand five hundred and fiftythree rank and file, and I should be uncandid if I were not to acknowledge, that I do not expect it will be increased by recruits in the course of the campaign, to more than ten thousand fit for duty in the field. This, Sir, in my opinion will be the full amount of the established regiments of the States east of Pennsylvania. To ascertain the number of militia, who may be assembled for occasional offensive operations, is more than I can do. The general opinion is, that there will be no want of militia for my enterprise we can have in view. Be this as it may, this one thing is certain, that this class of men are not only slow in their movements, but undertaking to judge also of the propriety of them in point of amount, will wait till the necessity for it strikes them, which, in most cases, is as injurious to the service as inability or want of inclination; disappointment being the consequence of delay. This observation I could not refrain from making, because in all combined operations, especially those which may depend upon the season or a limited period for their execution, it is of the utmost importance to be known.