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: