He was persuaded either that General Burgoyne would endeavour to take Ticonderoga, and to penetrate to the Hudson, in which event General Howe would co-operate with him by moving up that river, and attempting to possess himself of the forts and high grounds commanding its passage; or that Burgoyne would join the grand army at New York by sea; after which the combined armies would proceed against Philadelphia.
To counteract the designs of the enemy, whatever they might be, to defend the three great points, Ticonderoga, the Highlands of New York, and Philadelphia, against two powerful armies so much superior to him, in arms, in numbers, and in discipline, it was necessary to make such an arrangement of his troops as would enable the parts reciprocally to aid each other, without neglecting objects of great, and almost equal magnitude which were alike threatened, and were far asunder.

To effect these purposes, the troops of New England and New York were divided between Ticonderoga and Peekskill, while those from Jersey to North Carolina inclusive, were directed to assemble at the camp to be formed in Jersey.

The more southern troops remained in that weak quarter of the union for its protection.
[Sidenote: Camp formed at Middlebrook.] These arrangements being made, and the recruits collected, the camp at Morristown was broken up, the detachments called in, and the army assembled at Middlebrook, just behind a connected ridge of strong and commanding heights, north of the road leading to Philadelphia, and about ten miles from Brunswick.
This camp, the approaches to which were naturally difficult, was rendered still more defensible by intrenchments.

The heights in front commanded a prospect of the course of the Raritan, the road to Philadelphia, the hills about Brunswick, and a considerable part of the country between that place and Amboy; so as to afford a full view of the most interesting movements of the enemy.
The force brought into the field by America required all the aid which could be derived from strong positions, and unremitting vigilance.

On the 20th of May, the total of the army in Jersey, excluding cavalry and artillery, amounted to only eight thousand three hundred and seventy-eight men, of whom upwards of two thousand were sick.