The 3rd division of the 18th Corps, commanded by Brigadier-General Charles G. Paine, was composed of the 1st, 22nd, 37th, 5th, 36th, 38th, 4th, 6th, 10th, 107th, 117th, 118th and 2nd Cavalry, with Colonels Elias Wright, Alonzo G. Draper, John W. Ames and E. Martindale as brigade commanders of the four brigades. A cavalry force numbering about two thousand, comprising the 1st and 2nd, was under command of Colonel West,[31] making not less than 20,000 of the Phalanx troops, including the 4th Division with the Ninth Corps, and augmenting Butler's force to 47,000, concentrated at Yorktown and Gloucester Point.

On the 28th of April, Butler received his final orders, and on the night of the 4th of May embarked his troops on transports, descended the York river, passed Fortress Monroe and ascended the James River. Convoyed by a fleet of armored war vessels and gunboats, his transports reached Bermuda Hundreds on the afternoon of the 5th. General Wilde, with a brigade of the Phalanx, occupied Fort Powhatan, on the south bank of the river, and Wilson's Wharf, about five miles below on the north side of the James, with the remainder of his division of 5,000 of the Phalanx. General Hinks landed at City Point, at the mouth of the Appomattox. The next morning the troops advanced to Trent's, with their left resting on the Appomattox, near Walthall, and the right on the James, and intrenched. In the meantime, Butler telegraphed Grant:

"Off City Point, Va., May 5th.

"Lieut. Gen. Grant, Commanding Armies of the United States, Washington, D. C.:

"We have seized Wilson's Wharf Landing; a brigade of Wilde's colored troops are there; at Fort Powhatan landing two regiments of the same brigade have landed. At City Point, Hinks' division, with the remaining troops and battery, have landed. The remainder of both the 18th and 10th Army Corps are being landed at Bermuda Hundreds, above Appomattox. No opposition experienced thus far, the movement was comparatively a complete surprise. Both army corps left Yorktown during last night. The monitors are all over the bar at Harrison's landing and above City Point. The operations of the fleet have been conducted to-day with energy and success. Gens. Smith and Gillmore are pushing the landing of the men. Gen. Graham with the army gunboats, lead the advance during the night, capturing the signal station of the rebels. Colonel West, with 1800 cavalry, made several demonstrations from Williamsburg yesterday morning. Gen. Rantz left Suffolk this morning with his cavalry, for the service indicated during the conference with the Lieut.-General. The New York flag-of-truce boat was found lying at the wharf with four hundred prisoners, whom she had not time to deliver. She went up yesterday morning. We are landing troops during the night, a hazardous service in the face of the enemy.

"BENJ. F. BUTLER,

"A. F. Puffer, Capt. and A. D. C. Maj.-Gen. Commanding."

About two miles in front of their line ran the Richmond & Petersburg Railroad, near which the enemy was encountered. Butler's movements being in concert with that of the Army of the Potomac and the 9th Corps,—the latter as yet an independent organization.

General Meade, with the Army of the Potomac, numbering 120,000 effective men, crossed the Rapidan en route for the Wilderness, each soldier carrying fifty rounds of ammunition and three days rations. The supply trains were loaded with ten days forage and subsistence. The advance was in two columns, General Warren being on the right and General Hancock on the left. Sedgwick followed closely upon Warren and crossed the Rapidan at Germania Ford. The Ninth Corps received its orders on the 4th, whereupon General Burnside immediately put the Corps in motion toward the front. Bivouacking at midnight, the line of march was again taken up at daylight, and at night the Rapidan was crossed at Germania Ford. The corps marched on a road parallel to that of its old antagonist, General Longstreet's army, which was hastening to assist Lee, who had met the Army of the Potomac in the entanglements of the wilderness, where a stubborn and sanguinary fight raged for two days. General Ferrero's division, composed of the Phalanx regiments, reached Germania Ford on the morning of the 6th, with the cavalry, and reported to General Sedgwick, of the 6th Corps, who had the care of the trains. The enemy was projecting an attack upon the rear of the advancing columns. Gen. Ferrero was ordered to guard with his Phalanx division, the bridges, roads and trains near and at the Rapidan river. That night the confederates attacked Sedgwick in force; wisely the immense supply trains had been committed to the care of the Phalanx, and the enemy was driven back before daylight, while the trains were securely moved up closer to the advance. General Grant, finding that the confederates were not disposed to continue the battle, began the movement toward Spottsylvania Court House on the night of the 7th. The 9th Corps brought up the rear, with the Phalanx division and cavalry covering the trains.

Butler and his Phalanx troops, as we have seen, was within six miles of Petersburg, and on the 7th, Generals Smith and Gillmore reached the railroad near Port Walthall Junction, and commenced destroying it; the confederates attacked them, but were repulsed. Col. West, on the north side of the James River, forded the Chickahominy with the Phalanx cavalry, and arrived opposite City Point, having destroyed the railroad for some distance on that side.