battery on the Boston side of the water, on Cop's or Cope's hill,
served to cover and strengthen the post on Bunker's hill. Another
division was deeply entrenched on Roxbury neck. The light horse, and
an inconsiderable body of infantry, were stationed in Boston.

The American army lay on both sides of Charles river. The right
occupied the high grounds about Roxbury; whence it extended towards
Dorchester; and the left was covered by Mystic or Medford river, a
space of at least twelve miles. These extensive lines could not be
contracted without opening to the British general a communication with
the country.

For the purpose of a more distinct arrangement, the army was thrown
into three grand divisions. That part of it which lay about Roxbury
constituted the right wing, and was commanded by Major General Ward;
the troops near Mystic or Medford river formed the left, which was
placed under Major General Lee. The centre, including the reserve, was
under the immediate command of General Washington, whose head quarters
were at Cambridge.

The army consisted of fourteen thousand five hundred men; but several
circumstances combined to render this force less effective than its
numbers would indicate.

[Sidenote: Deficiency of the Americans in arms and ammunition.]

So long had the hope of avoiding open hostilities been indulged, that
the time for making preparations to meet them had passed away
unemployed, and the neglect could not be remedied. On General
Washington's arrival in camp, he had ordered a return of the