In response to this request, General McDowell submits, on the day
following, an estimate that "the actual entire force at the head of the
column should, for the purpose of carrying the position at Manassas and
of occupying both the road to Culpepper, and the one to the Gap, be as
much as 12,000 Infantry, two batteries of regular Artillery, and from
six to eight companies of Cavalry, with an available reserve, ready to
move forward from Alexandria by rail, of 5,000 Infantry and one heavy
field battery, rifled if possible; these numbers to be increased or
diminished as events may indicate." This force of raw troops he
proposes to organize into field brigades under the command of "active
and experienced colonels" of the regular Army. And while giving this
estimate as to the number of troops necessary, he suggestively adds that
"in proportion to the numbers used will be the lives saved; and as we
have such numbers pressing to be allowed to serve, might it not be well
to overwhelm and conquer as much by the show of force as by the use of
it?"

Subsequently McDowell presents to General Scott, and Mr. Lincoln's
Cabinet, a project of advance and attack, which is duly approved and
ordered to be put in execution. In that project or plan of operations,
submitted by verbal request of General Scott, near the end of June,--the
success of which is made contingent upon Patterson's holding Johnston
engaged at Winchester in the Shenandoah Valley, and also upon Butler's
holding the Rebel force near Fortress Monroe from coming to Beauregard's
aid at Manassas Junction,--McDowell estimates Beauregard's strength at
25,000, with a possible increase, bringing it up to 35,000 men. The
objective point in McDowell's plan, is Manassas Junction, and he
proposes "to move against Manassas with a force of 30,000 of all arms,
organized into three columns, with a reserve of 10,000."