War of the Rebellion: Serial 043 Page 0601 Chapter XXXIX. THE GETTYSBURG CAMPAIGN.

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with his brigade. Colonel Vincent moved with great promptness to the post assigned to him. The brigade consisted of the Sixteenth Michigan, the Forty-fourth New York, the Eighty-third Pennsylvania, and the Twentieth Maine Regiments. The Second Brigade, commanded by Colonel Sweitzer, arrived next upon the ground. This brigade consisted of the Fourth Michigan, the Sixty-second Pennsylvania, the Ninth Massachusetts, and the Thirty-second Massachusetts. The Ninth Massachusetts, however, was absent, being upon the special duty for which it had been detailed in the morning. Upon receiving his instructions, Colonel Sweitzer placed his command promptly in position. The First Brigade, under the command of Colonel Tilton, arrived next. This brigade was composed of the Eighteenth Massachusetts, the Twenty-second Massachusetts, the One hundred and eighteenth Pennsylvania, and the First Michigan Regiments. The position assigned to it was on the right of the ground occupied by the Second Brigade, and was immediately placed by Colonel Tilton in conformity with the instructions given to him. The division thus in position constituted the right of the Fifth Corps, and its place in line was one the left of the ground assigned to the Third Corps. The line was on the edge of a thick wood, the ground to the front being cleared of timber, but interspersed with rocks and some straggling trees. As the two brigades entered the wood, they passed over a line of troops, understood to be a portion of a brigade of the Third Corps; they were lying down upon the ground. Upon the right of our position an open space, apparently unprotected, extended to some distance. Upon calling the attention of General Sykes to it, he remarked, referring to the part of the Third Corps over which we had passed and then lying down in our rear, that those troops were to be removed. The remaining portion of the Third Corps was understood to be at some distance to the right, and much in advance of what seemed to be their natural and true position. This unguarded space was watched with great anxiety. There was little time, however, for deliberation. General Sykes, called by his duty to the left of the line, went toward that portion of his command. The attack of the enemy commenced almost immediately along my front. It was very severe, but was gallantly withstood. After some time, during which the firing was very heavy, the enemy showed himself in great force upon our right flank. He had penetrated through the unguarded space there, and commenced pouring in a destructive fire from the advantageous position he had gained, and without changing my front there were no means of checking his advance toward my rear. Colonel Tilton, commanding the First Brigade, which was on the right, was immediately directed to change his front to the right, and the order was at once executed, deliberately, yet promptly, and in good order. Colonel Sweitzer, commanding the Second Brigade, on the left of the First, was immediately notified of this change upon his right, and directed to fall back in good order, and to take up a new position a short distance in his rear, for the purpose of co-operating in opposing this heavy attack upon the flank. This brigade, consisting at that time of only three regiments, numbering in all, officers and men, 1, 010, was placed promptly and in good order as directed. The First Brigade numbered in all, officers and men, 654. Affairs being in this position, General Caldwell, commanding a