1861

Beginning of what will prove to be 23 days of operation in the Shenandoah Valley, Virginia, involving multiple commands.

Skirmish at Falling Water, West Virginia.

The new legislature of Western Virginia convenes at Wheeling, West Virginia, under the auspices of the Federal Government.

1862

Skirmish at Huntsville, Alabama.

Skirmish at Cutterback’s House on Van Dusen’s Creek, California.

Skirmishes at Haxall’s Landing, Malvern Hill, near New Kent Courthouse, and up Powell’s Big Fort Valley, Virginia.  McClellan pulled his army away from Malvern Hill and continued his retreat to Harrison’s Landing on the James River.

Union General John Dix and Confederate General Daniel H. Hill reached an agreement to exchange prisoners. Under the Dix-Hill cartel each soldier was assigned a value based on their rank.

1863

In Burkesville, Kentucky John Hunt Morgan, CSA, crosses the Cumberland River with approximately 2500 cavalry and begins a 24 day raid into Kentucky, Indiana, and Ohio.  This will be the last of Morgan’s four raids into Union-held territory. Morgan surrendered on July 26.

Skirmishes at the mouth of Coal Run, in Pike County, Kentucky and at Marrowbone, Kentucky.

Skirmish at Springfield Landing during the siege of Port Hudson, Louisiana.

Conditions continued to deteriorate in the Confederate lines during the 46th day of the siege of Vicksburg, MS.

Skirmishes near Chambersburg and Hunterstown, Pennsylvania.

Multiple skirmishes in Tennessee at Morris’s Ford and at Rock Creek Ford on the Elk River, and at Pelham

Skirmish at Estill Springs, Texas.

Skirmishes at Baltimore Crossroads and the Baltimore Store, Virginia.

Skirmish at Beverly, West Virginia.

The second day of battle at Gettysburg.  General Robert E. Lee's Army of Northern Virginia attacks General George G. Meade's Army of the Potomac at both Culp's Hill and Little Round Top, but fails to move the Yankees from their positions.

On the north end of the line, or the Union's right flank, Confederates from General Richard Ewell's corps struggled up Culp's Hill, which was steep and heavily wooded, before being turned back by heavy Union fire. But the most significant action was on the south end of the Union line. General James Longstreet's corps launched an attack against the Yankees, but only after a delay that allowed additional Union troops to arrive and position themselves along Cemetery Ridge. Many people later blamed Longstreet for the Confederates' eventual defeat. Still, the Confederates had a chance to destroy the Union left flank when General Daniel Sickles moved his corps, against Meade's orders, from their position on the ridge to open ground around the Peach Orchard. This move separated Sickles' force from the rest of the Union army, and Longstreet attacked. Although the Confederates were able to take the Peach Orchard, they were repulsed by Yankee opposition at Little Round Top. Some of the fiercest fighting took place on this day, and both armies suffered heavy casualties.

Lee's army regrouped that evening and planned for one last assault against the Union center on July 3. That attack, Pickett's charge, would represent the high tide of Confederate fortunes.

1864

Confederate General Joseph Johnston vacated his Kennesaw Mountain lines and pulled back to another prepared position below Marietta, Georgia.

In Mississippi, skirmishing occurred on the Byhalia Road, just south of Collierville, Tennessee.  Day one of an eight day Federal operation between Vicksburg and the Peal River, in Jackson, Mississippi.  The object of which was to destroy the bridge over the Peal.  The siege at Vicksburg enters day 47.

Skirmish at Fort Johnson, on James Island, Charleston, South Carolina harbor. Another South Carolina skirmish occurred near Secessionville.

Skirmish at Bolivar Heights, West Virginia, as Lieutenant General Jubal Early, CSA, reaches Winchester, Virginia and marches on toward Harper’s Ferry.

The U.S. Congress passed the Wade-Davis Bill. The bill required that a majority of a seceded state's white citizens take an oath of loyalty to the Constitution and guarantee black equality. President Lincoln pocket vetoed the plan.

1865

Day one of an eleven day operation against Indians in the vicinity of Camp Lyon, the Idaho Territory.

References:

The Civil War Day by Day, Philip Katcher
The Civil War Day By Day: An Almanac 1861-1865, by E. B. Long with Barbara Long
The Chronological Tracking of the American Civil War Per the Official Records of the War of Rebellion, by Ronald A Mosocco
http://www.history.com/this-day-in-history.do
http://www.on-this-day.com/cgi-bin/otd/uscivilwarotd/uscivilwarotd.pl