July 18 - American Civil War: The first formal African American military unit, the 54th Massachusetts Volunteer Infantry, unsuccessfully assaults Confederate-held Fort Wagner but their valiant fighting still proves the worth of African American soldiers during the war.
July 26 - American Civil War: Morgan's Raid ends - At Salineville, Ohio, Confederate cavalry leader John Hunt Morgan and 360 of his volunteers are captured by Union forces.
July 30 - Indian Wars: Chief Pocatello of the Shoshone tribe signs the Treaty of Box Elder, promising to stop harassing the emigrant trails in southern Idaho and northern Utah.
August 8 - American Civil War: Following his defeat in the Battle of Gettysburg, General Robert E. Lee sends a letter of resignation to Confederate President Jefferson Davis (Davis will refuse the request upon receipt).
September 8 - American Civil War: Second Battle of Sabine Pass - On the Texas-Louisiana border at the mouth of the Sabine River, a small Confederate force thwarts a Union invasion of Texas.
October 14 - American Civil War: Battle of Bristol Station - Confederate General Robert E. Lee forces fail to drive the Union army out of Virginia.
October 15 - American Civil War: The first successful submarine, the CSS Hunley sinks during a test, killing Horace Lawson Hunley (its inventor) and a crew of seven.
October 29 - American Civil War: Battle of Wauhatchie - Forces under Union General Ulysses S. Grant ward-off a Confederate attack led by General James Longstreet. Union forces thus open a supply line into Chattanooga, Tennessee.
November 16 - American Civil War: Battle of Campbell Station - Near Knoxville, Tennessee, Confederate troops led by General James Longstreet unsuccessfully attack Union forces under General Ambrose Burnside.
November 17 - American Civil War: Siege of Knoxville begins - Confederate forces led by General James Longstreet place Knoxville, Tennessee under siege (the two week long siege and one failed attack was unsuccessful).
November 23 - American Civil War: Battle of Chattanooga III begins - Union forces led by General Ulysses S. Grant reinforce troops at Chattanooga, Tennessee and counter-attack Confederate troops.
November 24 - American Civil War: Battle of Lookout Mountain - Near Chattanooga, Tennessee, Union forces under General Ulysses S. Grant capture Lookout Mountain and begin to break the Confederate siege of the city led by General Braxton Bragg.
November 25 - American Civil War: Battle of Missionary Ridge - At Missionary Ridge in Tennessee, Union forces led by General Ulysses S. Grant break the Siege of Chattanooga by routing Confederate troops under General Braxton Bragg.
November 26 - American Civil War: Mine Run - Union forces under General George Meade position against troops led by Confederate General Robert E. Lee (Meade's forces could not find any weaknesses in the Confederate lines and give-up trying after five days).
November 27 - American Civil War: Confederate cavalry leader John Hunt Morgan and several of his men escape the Ohio state prison and return safely to the South.
