was at Charles City
Court House on the James River. Burnside's and Wright's corps were on
the Chickahominy, and crossed during the night, Warren's corps and the
cavalry still covering the army. The material for a pontoon bridge was
already at hand and the work of laying it was commenced immediately,
under the superintendence of Brigadier-General Benham, commanding the
engineer brigade. On the evening of the 14th the crossing commenced,
Hancock in advance, using both the bridge and boats.

When the Wilderness campaign commenced the Army of the Potomac,
including Burnside's--which was a separate command until the 24th of May
when it was incorporated with the main army--numbered about 116,000 men.
During the progress of the campaign about 40,000 reinforcements were
received. At the crossing of the James River June 14th-15th the army
numbered about 115,000. Besides the ordinary losses incident to a
campaign of six weeks' nearly constant fighting or skirmishing, about
one-half of the artillery was sent back to Washington, and many men were
discharged by reason of the expiration of their term of service.* In
estimating our strength every enlisted man and every commissioned
officer present is included, no matter how employed; in bands, sick in
field hospitals, hospital attendants, company cooks and all. Operating
in an enemy's country, and being supplied always from a distant base,
large detachments had at all times to be sent from the front, not only
to guard the base of supplies and the roads to it, but all the roads
leading to our flanks and rear. We were also operating in a country
unknown to us, and without competent guides or maps showing the roads
accurately.

The manner of estimating numbers in the two armies differs materially.
In the Confederate army often only bayonets are taken into account,
never, I believe, do they estimate more than are handling the guns of
the artillery and armed with muskets (*36) or carbines. Generally the
latter are far enough away to be excluded from the count in any one
field. Officers and details of enlisted men are not included. In the
Northern armies the estimate is most liberal, taking in all connected
with the army and drawing pay.

Estimated in the same manner as ours, Lee had not less than 80,000 men
at the start. His reinforcements were about equal to ours during the
campaign, deducting the discharged men and those sent back. He was on
the defensive, and in a country