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The South Carolina Ordinance of Nullification was issued in response to the passage of the Tariff of 1832. In the Ordinance of Nullification, South Carolina threatened secession, which was a cause of the Nullification Crisis of 1832–33.

The definition and full text of the South Carolina Ordinance of Nullification of 1832. The South Carolina Ordinance of Nullification was issued in response to the passage of the Tariff of 1832. In the Ordinance of Nullification, South Carolina threatened secession, which was a cause of the Nullification Crisis of 1832–33.

Key facts about the Battle of South Mountain.

The Battle of South Mountain was fought in Frederick and Washington counties, Maryland, on September 14, 1862, during Confederate General Robert E. Lee's Maryland Campaign.

On January 23, 1865, General P. G. T. Beauregard issued an unnumbered special field order announcing that Lieutenant General Richard Taylor was replacing General John Bell Hood as commander of the Army of Tennessee.

On January 27, 1864, William T. Sherman issued Special Field Orders, No. 11, launching his Meridian Campaign.

On November 9, 1864, Major General William T. Sherman issued Special Orders No. 120, establishing the chain-of-command, objectives, and directives for the Savannah Campaign.

On April 30, 1862, Major General Henry W. Halleck transferred Major General George H. Thomas from the Army of the Ohio to command the Army of the Tennessee in place of Major General Ulysses S. Grant who became Halleck's second-in-command.

On July 26, 1864, William T. Sherman issued Special Field Orders No. 44, assigning Oliver O. Howard to command of the Army of the Tennessee.

On June 14, 1864, Major General Benjamin F. Butler relieved Major General Quincy A. Gillmore of command of the Tenth Army Corps operating within the Department of Virginia and North Carolina.

On June 17, 1864, Major General Benjamin F. Butler issued special orders announcing that he was withdrawing his previous orders relieving Major General Quincy A. Gillmore of his command.

On July 21, 1861, Confederate General Joseph E. Johnston issued an unnumbered special order approving Brigadier General P. G. T. Beauregard's plan of attack for the First Battle of Bull Run.

On May 16, 1861, the U.S. War Department issued Special Orders, No, 135 relieving Brigadier General William S. Harney as commander of the Department of the West.

On September 10, 1861, the Confederate War Department issued Special Orders, No. 149, appointing General Albert Sidney Johnston to command of Confederate forces in the Western Theater.

On May 31, 1861, Major General Robert E. Lee issued Special Orders, No. 149, announcing that Brigadier General P. G. T. Beauregard was assigned to the command of the troops in the Alexandria line near Manassas Junction, Virginia.

On January 20, 1863, Major General Ambrose E. Burnside issued Special Orders, No. 20, (AOP) confirming the appointment of Major General Franz Sigel as commander of the Grand Reserve Division of the Army of the Potomac.

On June 1, 1862, Robert E. Lee issued Special Orders, No. 22, taking command of Confederate troops in Eastern Virginia and North Carolina that would henceforth be known as the Army of Northern Virginia.

On September 5, 1862, the U.S. War Department issued Special Orders, No. 223, announcing that Joseph Hooker was assigned to command of the 5th Army Corps and that Fitz John Porter, William B. Franklin, and Charles Griffin were relieved of their commands.

On July 7, 1864, the U.S. War Department issued Special Orders, No. 230 relieving Major General Franz Sigel and Major General Julius Stahel from duty in the District of Harper's Ferry.

On June 3, 1863, the Department of the Army issued Special Orders, No. 249 replacing Major General David Hunter with Brigadier General Quincy A. Gillmore as commander of the Department of the South.