ports from various sources led me to believe that the enemy had
detached three divisions from Petersburg to reinforce Early in the
Shenandoah Valley. I therefore sent the 2d corps and Gregg's division
of cavalry, of the Army of the Potomac, and a force of General Butler's
army, on the night of the 13th of August, to threaten Richmond from the
north side of the James, to prevent him from sending troops away, and,
if possible, to draw back those sent. In this move we captured six
pieces of artillery and several hundred prisoners, detained troops that
were under marching orders, and ascertained that but one division
(Kershaw's), of the three reputed detached, had gone.

The enemy having withdrawn heavily from Petersburg to resist this
movement, the 5th corps, General Warren commanding, was moved out on the
18th, and took possession of the Weldon Railroad. During the day he had
considerable fighting. To regain possession of the road, the enemy made
repeated and desperate assaults, but was each time repulsed with great
loss. On the night of the 20th, the troops on the north side of the
James were withdrawn, and Hancock and Gregg returned to the front at
Petersburg. On the 25th, the 2d corps and Gregg's division of cavalry,
while at Reams's Station destroying the railroad, were attacked, and
after desperate fighting, a part of our line gave way, and five pieces
of artillery fell into the hands of the enemy.

By the 12th of September, a branch railroad was completed from the City
Point and Petersburg Railroad to the Weldon Railroad, enabling us to
supply, without difficulty, in all weather, the army in front of
Petersburg.

The extension of our lines across the Weldon Railroad compelled the
enemy to so extend his, that it seemed he could have but few troops
north of the James for the defence of Richmond. On the night of the
28th, the 10th corps, Major-General Birney, and the 18th corps,
Major-General Ord commanding, of General Butler's army, were crossed to
the north side of the James, and advanced on the morning of the 29th,
carrying the very strong fortifications and intrenchments below
Chaffin's Farm, known as Fort Harrison, capturing fifteen pieces of
artillery, and the New Market Road and intrenchments. This success was
followed up by a gallant assault upon Fort Gilmer, immediately in front
of the Chaffin Farm fortifications, in which we were repulsed with heavy
loss. Kautz's cavalry was pushed forward on the r