He first went to California as manager of the San Francisco branch of a St. Louis bank, but the ill success of the enterprise drove him east again in 1857, when he engaged in the banking business in New York City. To this enterprise, however, the famous panic of 1857 put an early end, and in 1858 he was embarked in the law, with an office at Leavenworth, Kan. This, too, failing to supply sufficient bread and butter, he tried farming in Ohio for a while, and then applied for a government position in Washington. Instead of this, however, he secured an appointment as Superintendent and Professor of Engineering in a new military college just started at Alexandria, in Louisiana. He entered upon the duties of his position on the 1st of January, 1860, when the mutterings of rebellion were already abroad; and just as he had put the academy into good working order the war-cloud became so black that Sherman, in a manly letter to Governor Moore, of Louisiana, declared his intention of maintaining his allegiance to "the old constitution as long as a fragment of it survives," resigned his office, and returned to Ohio. In April, 1861, he accepted the presidency of a St. Louis street railway company. Then Sumter was fired on, the war fever filled the land, troops were hurried to the front, and Sherman signified to the Secretary of War his desire to serve his country "in the capacity for which I was trained." On May 14, 1861, he was appointed colonel of the Thirteenth United States Infantry, and assigned to inspection duty in Washington under General Scott, the commander-in-chief; and then the real story of his life began.

At first fate seemed to be against him. He was too outspoken and hard-headed to suit the reckless and effusive boasters of those early days of the war, which he insisted would be long and bloody, unless the whole military power of the Republic was put into the field to crush the rebellion before it could grow into a revolution. He was as disgusted as Washington had been in revolutionary times, with short-service enlistments, and refused point-blank to go to Ohio to enlist "three-months men," saying, in his blunt way, "You might as well try to put out fire with a squirt gun as expect to put down this rebellion with three-months troops." He was assigned to the command of the Third Brigade of the First Division of McDowell's army, and had his "baptism of fire" upon the disastrous field of Bull Run, which he has characterized as "one of the best planned and worst fought battles of the war." That famous "skedaddle," as it was the fashion to call it, he frankly admitted, in his official report, began among the men of his brigade, and the "disorderly retreat" speedily became a humiliating rout, which only a few cool-headed officers, such as Colonel Sherman, could check or control.

The chagrin over the stampede at Bull Run was so great, that the more conscientious Union officers expected to be held responsible for it and duly court-martialed; but to Colonel Sherman's surprise, his superiors saw beyond the demoralization of the moment, and in August, 1861, he was made brigadier-general of volunteers and transferred to the Department of the Cumberland, with head-quarters at Louisville, Ky. From thenceforth all his fighting and all his fame was associated with the armies of the West.

At once he saw the desperate condition of affairs in Kentucky—a border State, only to be held for the Union by prompt and decisive measures. He called for reinforcements frequently and emphatically, and when the Secretary of War visited him on a tour of inspection, and asked his views on the situation, Sherman paralyzed him by asserting that for the defence of Kentucky, 60,000 men were needed at once, and that 200,000 would be necessary there before the war in that State could be ended. This was so out of proportion to the Secretary's estimate that Sherman was declared crazy; he was deprived of his command at the front and relegated to a camp of instruction near St. Louis.

But so shrewd and correct an observer, so energetic a leader, and so determined a fighter, could not long be left in retirement, and in February, 1862, General Sherman was ordered to assume command of the forces at Paducah, Ky. Desperate fighting soon followed. The battle of Shiloh (sometimes called Pittsburg Landing) showed of what stuff the "crazy Sherman," as the newspapers had called him, was made, and from Shiloh's bloody field in 1862, to Johnston's surrender at Raleigh in 1865, Sherman's fame rose steadily, until it left him one of the three greatest generals of the Civil War, and one of the famous commanders of the century.

From Shiloh to Raleigh, Sherman stood, in a measure, as Grant's right hand, for, even when Grant was "hammering away" in Virginia, Sherman, by his strategy, shrewdness, and daring in the West was giving him material support and help. In the three years of fighting, from 1862 to 1865, these events stand prominently out in Sherman's military record—the tenacity with which he held the right of the line at Shiloh, the faithful service he rendered as commander of the left before Vicksburg, his rapid relief of Knoxville, his brilliant capture of Atlanta, his daring and famous march to the sea and the capture of Savannah, his equally daring march through the Carolinas to the help of Grant, and his final capture of Johnston's army, which was the real close of the war.

In all these events the peculiar traits of character that made Sherman so conspicuous a success stood out in bold relief—his coolness in danger, his bravery in action, his daring in devices, his readiness of invention, his electric surprises, his scientific strategy, his ruthlessness in destruction, his courtesy to the conquered, his devotion to his soldiers, his loyalty to his superior in command, his restlessness, his energy, his determination to succeed. These all contributed to the result that made "Sherman's army" famous the world over, and stamped him as the hero of a campaign that, according to military critics, "stands alone in the history of modern warfare."

His scientific fencing with General Joseph E. Johnston, the Confederate leader, was as masterly as it was effective. He forced his rival from the stand he had taken as warder of the gateways to the South's supply land, fighting him step by step from Dalton backward to Atlanta, and capturing that stronghold of the Confederacy by persistent and desperate fighting. Then, when Atlanta was won, Sherman's ability to cut the Gordian knot, as no other man dared, was displayed with especial force. Instead of frittering away his precious time by simply holding Atlanta, or wasting strength unnecessarily by hunting up a baffled and elusive foe, or devoting all his energy to keeping open his long line of communication and supply, he determined to strike a disastrous blow at the Confederacy, swiftly and unexpectedly. Cutting loose from his connection with the West, he would live on the enemy and lay waste the storehouse of the Confederacy—or, as he expressed it in outlining his plans to General Grant, "move through Georgia, smashing things, to the sea."

The boldness of this desperate measure at first attracted, as it afterward alarmed, the authorities at Washington. Consent was given and then recalled, but, before the recall could reach him Sherman had acted quickly, fearing this same countermand. Upon receipt of the order consenting to his march, he cut the telegraph wires to the north, then he burned his bridges, tore up the railroad that connected him with the West, and, with his army reduced to its actual available fighting strength of 60,000 men, with banners streaming, gun-barrels glistening in the sun, bands playing, and the men singing lustily "Glory, glory, hallelujah!" Atlanta was left behind, and "Sherman's army" set its face eastward and commenced its memorable march to the sea.

In two parallel columns the army of invasion and destruction moved through the fertile land, cutting a swath of desolation forty miles wide, and crippling the Confederacy by dissipating its most cherished resources. For fully a month the army was practically lost, so far as communication with the North was concerned. Then it struck the sea at Savannah, captured that beautiful city, and, in the celebrated despatch which actually reached President Lincoln on Christmas Eve, General Sherman presented to the President and the country "the city of Savannah, as a Christmas gift."