1861

Federal forces abandon For McLane, the New Mexico Territory

Martinsburg, West Virginia, is occupied by Federal forces.

1862

Cavalry skirmish near Russellville, Alabama.

Skirmish at Locust Grove, the Indian Territory.

Federal mortar boats bombard Vicksburg, Mississippi.

Beginning of two days of skirmishing along Herring Creek, Virginia.

1863

Skirmish on Ossabaw Island and McDonald’s Place, Georgia.

In New Orleans, Louisiana, public gatherings, except church services were forbidden.  No more than three persons were allowed to congregate at one place on the streets.  A 9:00 pm curfew was imposed by occupying Federal forces.

Skirmish at Columbia, Kentucky.  Federal expedition that started at Beaver Creek, Kentucky and ended in Southwestern Virginia, with skirmishes at Pond Creek, West Virginia and Gladesville, Virginia,

Skirmish at Salem, Missouri

Federal raid on the Wilmington and Weldon Railroad, in North Carolina.

Skirmish at Fairfield, Pennsylvania.

Skirmish at Boiling Fork, which is in the vicinity of Winchester, Tennessee.

Federal reconnaissance from Memphis, Tennessee on the Hernando and Horn Lake roads, with skirmishing just across the Mississippi/Tennessee state line.  On the 47th day of the siege at Vicksburg, Mississippi, white flags of truce flew on the Confederate works as Pemberton and Grant discuss surrender terms of the Vicksburg garrison.  The formal surrender would take place on the 4th of July.

Suffolk, Virginia is evacuated by Union forces.

Pickett leads his infamous charge at Gettysburg.  Troops under Confederate General George Pickett begin a massive attack against the center of the Union lines at Gettysburg on the climactic third day of the Battle of Gettysburg, the largest engagement of the war. General Robert E. Lee's Army of Northern Virginia encountered George Meade's Army of the Potomac in Pennsylvania and battered the Yankees for two days. The day before Pickett's charge, the Confederates had hammered each flank of the Union line but could not break through.

Now, on July 3, Lee decided to attack the Union center, stationed on Cemetery Ridge, after making another unsuccessful attempt on the Union right flank at Culp's Hill in the morning. The majority of the force consisted of Pickett's division, but there were other units represented among the 15,000 attackers.

After a long Confederate artillery bombardment, the Rebel force moved through the open field and up the slight rise of Cemetery Ridge. But by the time they reached the Union line, the attack had been broken into many small units, and they were unable to penetrate the Yankee center.

The failed attack effectively ended the battle of Gettysburg. On July 4, Lee began to withdraw his forces to Virginia. The casualties for both armies were staggering. Lee lost 28,000 of his 75,000 soldiers, and Union losses stood at over 22,000.

1864

Sherman’s armies move forward, past Joe Johnston’s Kennesaw Mountain and on through Marietta, toward the new Confederate postion along Nickajack Creek, Georgia.  There was skirmishing  Kingston, Ruff’s Mills, Big Shanty, and the Sweetwater Bridge, Georgia.

Skirmish along the Amite River at Benton’s Ferry, near Baton Rouge, Louisiana.

Skirmish near St Joseph, Missouri

Union assaults on Fort Johnson and Battery Simkins, Charleston Harbor, South Carolina are repulsed.  Skirmish at King’s Creek, and near White Point, South Carolina.

Skirmish near La Grange, Tennessee.

Skirmish at Buckton, Virginia.

Skirmishing at North River Mills, North Mountain, Martinsburg, Darkesville, and Leetown, West Virginia.
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