Although Rousseau's military career was of the greatest credit to him, nothing of it reflects such honor on the soldier, or illustrates so nobly the character of the man, as did his conduct during the operations which I have sketched. Still, his military career won for him as great popularity with the army as his action in destroying neutrality had done with the people. His principal achievements were at Shiloh, Perryville, Stone River, the pursuit and defeat of Wheeler in Tennessee, the defense of Fortress Rosecrans, and in the admirably conducted and highly successful raid into Alabama. At Shiloh his post was subordinate, and he will not occupy the foreground of the pictures which history will paint of that field, though he won recognition from Sherman, McClernand, and Grant for his gallantry. At Perryville the glory is all his own, while no story of Stone River can be truthfully written that does not give him much of the credit for that very desperate "rough-and-tumble" fight, where, holding the reserve line, he sent word to Rosecrans that, "though the right wing was gone," he "would not budge a step—not a d—d inch, sir."

Without having the education, Rousseau had in him the military instinct which lights the fire and gives inspiration to others, and his every battle displays him in this light. During the engagement at Perryville he displayed great courage, and inspired his men with the same spirit. He laid no claim to tactical ability, and did not endeavor to manœuvre his troops, but by his presence with them kept them well together, and retained his organization during the whole day, although withstanding with a single division the repeated attacks of Cheatham's, Buckner's, and Anderson's divisions of Bragg's army, under the latter's personal direction. Perhaps like a reckless general, but certainly like a brave man, he was always with the front line, and as he rode among the men encouraging them, they hailed him with enthusiastic cheers. At one time during the battle, seeing preparations making on the part of the rebels to repeat an attack on Harris's brigade, by which they had just been repulsed, Rousseau dashed up to the commanding officer of the Second Ohio, Major Anson McCook, who was on foot fighting his regiment, and was warning him of the approaching attack, when the men of the regiment, with shouts and hurrahs, gathered around him, hugging his legs and grasping his hands, throwing their caps in the air, and swearing to die with him. It was one of the most singular scenes ever witnessed on a battle-field, and was subsequently alluded to by rebel officers who had witnessed it, and who stated to our prisoners taken during the day that they frequently saw and recognized Rousseau riding up and down the line during the battle.

Rousseau was much predisposed, by reason of his mental organization, to excitability under fire, but it did not detract from his administrative power. He was as clearly administrative in danger as the more phlegmatic Thomas or Grant, but in a different way. Rousseau made very little, if any, use of his aids. If he had an order to give, he galloped across the field and gave it himself. If he had an advance to order, it was done by leading the troops in person. During this battle of Perryville, General McCook sent me to inform Rousseau, who was on the extreme left of the line, that his right was being turned and was falling back. Rousseau galloped to the endangered part of the line and rallied the troops in retreat, beating and cursing them into line, and actually breaking his sword over the head of one demoralized individual, who was thus brought to a stand. The enemy, however, continued to advance, and Rousseau was compelled to look around for farther assistance. Seeing Captain Charles O. Loomis's battery in position, in reserve, commanding a little valley into which the enemy had deployed, and through which they were rapidly advancing, he rode up to Captain Loomis and ordered him to open with canister. Loomis had not perceived the advancing enemy, and explained to Rousseau that he had been ordered into reserve by General McCook, and told to reserve his fire for close work.

"Close work!" exclaimed Rousseau; "what the devil do you call that, Captain Loomis?"

He pointed down the valley, and Loomis saw in an instant the advancing foe and his own danger. Loomis was a minute-man—one of the quickest-witted and brightest-eyed men I ever met—and in a second his six guns were pouring a destructive cross-fire into the rebel ranks that at once played havoc with the enemy and encouraged our own forces. The enemy thus advancing had flanked Lytle's brigade, and it was now falling back toward Loomis's position, but Rousseau's personal direction and appearance (Lytle had been left for dead on the field), and the opening guns of Loomis, soon reassured the men in retreat, and the line re-formed. About the same time Sheridan's brigade was ordered in on the left by General Buell, and the enemy were speedily and bloodily repulsed.

His conduct in this engagement gained Rousseau his promotion to a major generalcy. The commission read, "promoted for distinguished gallantry," and was the first of the numerous promotions for gallantry issued during the war for the Union. His great popularity with the troops may be said to have dated from this day; and it grew still greater after the battle of Stone River, where, though commanding the reserves, he was among the first engaged. The love of the men became so intense that it broke out on every occasion. On the march, in camp, on parade, their admiration grew demonstrative, and cheers greeted him wherever he went. During the winter of 1862-'63, while the troops were in camp at Murfreesborough, great numbers of rabbits were frequently frightened from their burrows, when an entire regiment would start in pursuit with noisy yells. The demonstrations of admiration for Rousseau and these noisy pursuits of the rabbits became so frequent that it was a common remark, whenever the cheering of the soldiers was heard, that they were either after "Rousseau or a rabbit."

I have said that Rousseau was clearly administrative under all circumstances. He was once, and once only, known to betray any considerable nervousness under fire. It was during a brief engagement fought at Chehaw Station, when on his famous Alabama raid. He had sent forward Colonel Thomas Harrison, of the Eighth Indiana Cavalry (better known as the Thirty-ninth Mounted Infantry), to destroy a part of the railroad in his rear—the expedition then being on its return, having performed its principal purpose. Colonel Harrison unexpectedly became briskly engaged with the rebel forces under General James H. Clanton. Rousseau was some distance in the rear of the fight, and the extent of the engagement was only known to him by the amount of the firing and the number of wounded men brought to the rear. One of his aids—Captain Elkin—observed Rousseau's nervousness gradually increasing, as evinced by his twirling his long black mustache, and repeating aloud, but evidently communing with himself,

"I shouldn't have got into this affair. I'm very much afraid this isn't judicious."

Elkin penetrated through the swamps to Harrison's front, and returned with the information that the enemy were being driven, and that the result was not at all doubtful.