“General Dwight was now ordered to halt, take a favorable position, and hold it. This was done, the enemy continuing to manœuvre in front of General Dwight’s and Colonel Birge’s commands, for two or three hours.
“Our troops in the mean time, had been ordered by General Grover to rest in their places until further orders, which they did until about three P. M., when an order was given to feel the enemy on the front and flank, with a view to our attacking their position in force.
“Before any considerable advance further was made the enemy evacuated, retreating to the woods and canes, having previously set fire to the gunboat Diana, and transports Gossamer, Newsboy, and Era No. 2. They were signally repulsed, with a loss of from three to four hundred. On the field of battle, one hundred and fifty prisoners were taken, and thirty wounded.
“Among the killed is General Riley, and among the wounded, Colonel Gray.”
This success of General Grover was followed by the evacuation of the works before General Banks. Early on Tuesday, the 15th, the cavalry and artillery, followed by General Weitzel’s brigade, with Colonel Ingram’s force of General Emory’s division, as a support, followed the enemy. So rapid was the pursuit that the enemy was unable to remove their transports at New Iberia, and five, with all the commissary stores and ammunition with which they were loaded, were destroyed at that place, together with an incomplete iron-clad gunboat. On Thursday the army reached New Iberia. A foundry for the manufacture of cannon and other munitions of war was immediately taken possession of, and a similar one had been seized two days before at Franklin. Two regiments were also sent to destroy the tools and machinery at the celebrated salt mine of the town. Thus far about fifteen hundred prisoners had been captured, and more than five hundred horses, mules, and beef cattle taken from the plantations. The Federal loss was small. The entire force of the enemy was about ten thousand men.
On the next day, the 17th, the army moved forward, but General Grover, who had marched from New Iberia by a shorter road, and thus gained the advance, met the enemy at Bayou Vermilion. Their force consisted of a considerable number of cavalry, one thousand infantry and six pieces of artillery, massed in a strong position on the opposite bank. They were immediately attacked and driven from their position but not until they had succeeded in destroying by fire the bridge across the river. The night of the 17th and the next day was passed in rebuilding the bridge. On the 19th, the march was resumed, and continued to the vicinity of Grand Coteau; and on the next day the main force of General Banks occupied Opelousas. At the same time, the cavalry, supported by a regiment of infantry and a section of artillery, were thrown forward six miles to Washington, on the Courtableau. On the 21st, no movement was made, but on the next day, Brigadier-General Dwight, of General Grover’s division, with detachments of artillery and cavalry, was pushed forward through Washington toward Alexandria. He found the bridges over the Cocodrie and Bœuf destroyed, and during the evening and night replaced them by a single bridge at the junction of the bayous. Orders were also found there from General Moore to General Taylor, in command of the Confederate force, directing him to retreat slowly to Alexandria, and, if pressed, to retire to Texas.
Bute a la Rose, with its garrison of sixty men, two heavy guns, and a large quantity of ammunition, was captured by General Banks. The result of the expedition thus far is thus stated by General Banks: “We have destroyed the enemy’s army and navy, and made their reorganization impossible by destroying or removing the material. We hold the key of the position. Among the evidences of our victory are two thousand prisoners, two transports, and twenty guns taken, and three gunboats and eight transports destroyed.” The Federal loss in the land battle was six or seven hundred.
Admiral Porter took possession of Alexandria on the 6th of May, without opposition, and General Banks established his headquarters at that place on the day following. This town is situated on the Red river, one hundred and fifty miles from its mouth. Admiral Porter thus describes his operations at this time in a dispatch to Secretary Welles, dated May 13:
“Sir: I had the honor to inform you from Alexandria of the capture of that place, and the forts defending the approaches to the city, by the naval forces under my command. Twenty-four hours after we arrived the advance guard of United States troops came into the city. General Banks arriving soon after, I turned the place over to his keeping. The water beginning to fall, I deemed it prudent to return with the largest vessels to the mouth of the Red river. I dropped down to Fort de Russe in the Benton, and undertook to destroy these works. I only succeeded however, in destroying the three heavy casemates commanding the channel and a small water battery for two guns. About six hundred yards below it I destroyed by bursting one heavy thirty-two pounder and some gun carriages left in their hurry by the enemy.
“The main fort, on a hill some nine hundred yards from the water, I was unable to attend to. It is quite an extensive work, new and incomplete, but built with much labor and pains. It will take two or three vessels to pull it to pieces. I have not the powder to spare to blow it up. The vessels will be ordered to work on it occasionally, and it will be soon destroyed. In this last-mentioned fort was mounted the 11-inch gun, which I am led to believe lies in the middle of the river, near the fort, the rebels throwing it overboard in their panic at the approach of our gunboats. The raft which closed the entrance I have blown up, sawed in two, and presented to the poor of the neighborhood. I sent Commander Woodworth in the Price, with the Switzerland, Pittsburg, and Arizona, up Black river to make a reconnoissance, and he destroyed a large amount of stores, valued at three hundred thousand dollars, consisting of salt, sugar, rum, molasses, tobacco, and bacon.