The head of Grover's column had gone about two miles, and in a few moments more would have turned the sharp corner of the bayou and faced toward Franklin, when, on the right, near the sugar-house, Birge's skirmishers ran into those of Clack's battalion, and the battle of Irish Bend began.
Between Birge and the concealed Confederate ranks, past which he was in fact marching, while his line of direction gave his right flank squarely to the hostile front, lay the broad and open fields of McKerrall's plantation, where the young sugar-cane stood a foot high above the deep and wide furrows. From recent ploughing and still more recent rains the fat soil was soft and heavy under foot, and here and there the cross-furrows, widening and deepening into a ditch, added to the toil and difficulty of movement, both for men and guns. On the left flowed the dark and sluggish Teche. On the right lay the swamp, thickly overgrown and nearly impassable, whence the waters of the Choupique begin to ooze toward the Gulf. Along the southern border of this morass ran a great transverse ditch that carried off the gathered seepage of the lesser drains. In front, on the western edge of the cane-field, stood Nerson's woods, where, as yet unseen, the Confederates lay in wait; while before them, like a screen, stretched a low fringe of brake and undergrowth.
Birge's order of march placed the 25th Connecticut in the advance, one wing deployed as skirmishers across the road, the other wing in reserve. Next came the 26th Maine with Bradley's section of Rodgers's battery, then the 159th New York, then the remainder of Rodgers's battery, while the 13th Connecticut brought up the rear. When he saw his skirmishers briskly engaged and by the sound and smoke discovered the position of the enemy, Birge made the reserved battalion of the 25th Connecticut change front forward and move across the field against the Confederate left. Bissell led his men quickly to within a hundred yards of the wood, where they lay down under the partial cover of a ditch and began firing. Hubbard, with the 26th Maine, came up on Bissell's left and took up the same tactics. At once the enfilade fire of the Confederate line became vigorous and annoying, until Bradley took his two guns at a gallop to the skirt of the undergrowth opposite the interval between the infantry battalions and, opening fire at five hundred yards' range, engaged for a time the whole attention of the Confederate cannoneers. Then Grover, who rode with Birge, sent in the 159th New York on the left of the 26th Maine, with orders to take the wood, while the 13th Connecticut, marching round the bend of the bayou, formed on the extreme left between the stream and the road.