In order to provide greater financial security for his growing family, Sherman resigned from the army to accept a management position with a San Francisco bank (1853-1857). When financial problems caused the bank to close, he took a similar position with a branch bank in New York City, only to have it fold during the economic panic of 1857. He next joined the real-estate and legal firm of two of his brothers-in-law in Leavenworth, Kansas. Dissatisfied, Sherman accepted a post as superintendent of the new Louisiana Military Seminary (today, Louisiana State University) in 1859. He thoroughly enjoyed the position and gained respect for both his achievements in establishing the school on a sound foundation and for his proslavery views.

When Louisiana seceded from the Union two years later, Sherman made the difficult decision to resign his job and leave the state, taking a position in St. Louis as president of a streetcar company. He rejoined the U.S. army in May 1861 at the rank of colonel and on June 30 was promoted to brigade commander under General Irvin McDowell in Virginia. In August he became second in command of the Department of the Cumberland (Kentucky and Tennessee), but soon had to take over for the commander, Robert Anderson, who suffered a nervous breakdown. At his own request, Sherman was soon relieved of his duties, then transferred to the Missouri theater to serve under General Henry Halleck.

Since the beginning of the war, Sherman had been worried about the Union’s chances for success and was continually vocal about his pessimism. Consequently, Halleck ordered Sherman to take leave to rest with his family in Lancaster, Ohio. The press, with whom Sherman already had a bad relationship, reported that he was insane. While untrue, his lifelong depression was exacerbated to the point that he considered suicide. A few months later he returned to the army, first training troops in Missouri, then in March 1862 as division commander. His performance at the battle of Shiloh (April 6-7, 1862) earned him the praise of Halleck and General Ulysses S. Grant, while serving with Grant gave him hope for the Union cause.

In June 1862 Sherman was named military governor of Union-occupied Memphis. His experience there, dealing with guerrilla and civilian Confederates, led him to view the war as one between entire societies rather than as just a military clash. Returning to the combat zone in the fall, Sherman suffered some battlefield losses and resultant negative press, provoking him to court-martial a New York Herald reporter, Thomas Knox (the only court-martial of a member of the news media in American history). Sherman and his men participated with Grant during the siege of Vicksburg (March 29 - July 4, 1863), helping to drive the Confederate forces under General Joseph E. Johnston out of the area. In the fall of 1863 Sherman was named to command the Department of the Army of the Tennessee.

In March 1864 Grant became the Union’s general in chief and Sherman was tapped to head operations in the Western theater. As Grant maneuvered Confederate General Robert E. Lee into a corner in Virginia, Sherman marched his troops from Chattanooga into Georgia, capturing Atlanta in September—a major victory which lifted Union spirits and helped ensure President Lincoln’s reelection. Sherman’s tactics, which Lincoln and Grant had originally opposed, involved massive property destruction aimed at undermining the will of the general populace in the Confederacy. Those tactics, controversial to this day, often appear ruthless, but were motivated by a desire to minimize battle carnage and to force an end to the long, bloody, and destructive war. Sherman and his men proceeded in the "March to the Sea" (November 15 - December 21, 1864) to Savannah, Georgia, before turning northward in the Carolinas Campaign (January - April 14, 1865). Although the property destruction was extensive, casualties numbers were low.

After fighting an aggressive war, Sherman favored a lenient peace. His charitable terms to surrendering Confederate General Johnston sparked harsh criticism, including charges of treason, from the press and some administration officials, compelling him to revise his offer. Except for the extinction of slavery, Sherman favored returning to the status quo ante bellum. He refused, however, to allow Andrew Johnson to make him a pawn in the president’s struggle with Congress over control of the reconstruction process.

Upon Grant’s inauguration as president in March 1869, Sherman took over as general in chief of the U.S. army. He was frustrated by Congressional downsizing of the military, the failure of political leaders to heed his advice, and squabbling with Secretary of War William Belnap over military authority. Sherman departed from the Washington scene whenever possible, touring Europe and the Middle East (1871-1872) and staying in St. Louis for eighteen months (1874-1876). As general in chief he established an officers-training school at Fort Leavenworth, Kansas. He retired in 1884 and was in great demand for delivering after-dinner speeches. He declined encouragement to run for the presidency by stating that "I will not accept if nominated and will not serve if elected." He had earlier (1880) coined the phrase, "War is Hell." Sherman is one of the most important figures in American military history.

Source consulted: American National Biography; Mark Boatner, The Civil War Dictionary.