1861

Skirmish at Middle Fork Ridge, West Virginia.

At a Cuban port, CSS Sumter, deposited seven prizes taken in her first Federal commerce raiding foray

1862

Skirmish at Bayou Cache and another at Grand Prairie, Arkansas.

Beginning of a four day Federal operation between Blackwater and Chapel Hill, Missouri.  Beginning of a three day Federal operation between Waynesville and Big Piney, Missouri.  Skirmish at Salem, Missouri.

From North Carolina, Maj. Gen. A E Burnside, USA, sailed with reinforcements for the Army of the Potomac on the James River in Virginia.

1863

At Huntington, Indiana, the Knights of the Golden Circle, a Copperhead group, forced their way in the depot and seized weapons and ammunition.

Morgan’s raiders briefly occupy Garnettsville, Kentucky

Skirmishes at Boonsborough, Hagerstown and Williamsport, Maryland.

Skirmishes at Jones’ and Messigner’s Ferry as Maj. Gen. William T Sherman, USA, marches his Federal forces toward Jackson, Mississippi

Skirmish near Trenton, North Carolina.

Rear Admiral John A. Dahlgren relieved Rear Admiral Samuel F. Du Pont.  The transfer came after considerable friction between Du Pont and the Secretary of the Navy Welles over responsibility for the failure of the attack on Charleston. South Carolina.  It marked the end of the Du Pont’s naval career.

1864

Action against Indian at Fort Goodwin, in Southeastern Arizona.

Skirmish near Benton, Arkansas.

Cavalry and reconnaissances continued on the Atlanta Front, with skirmishing at Sandtown and Nickajack Creek.

Skirmish near Antietam, Maryland.

Beginning of a twenty-five day Federal operation in Western Missouri.  Skirmish near the Little Blue, Jackson County, Missouri.

Skirmish near Aldie, Virginia, at Mount Zion Church.

Skirmishes at Big Cacapon Bridge and at Sir John’s Run, West Virginia.

Confederate General Jubal Early's troops cross the Potomac River and ocupy Hagerstown, Maryland. Early had sought to threaten Washington, D.C., and thereby relieve pressure on General Robert E. Lee, who was fighting to keep Ulysses S. Grant out of Richmond.

During the brutal six-week campaign against Grant in June 1864, Lee was under tremendous pressure. On June 12, he dispatched Jubal Early to Lynchburg, in western Virginia, to hold off a Union attack by General David Hunter. After defeating Hunter, Early was ordered to head down the Shenandoah Valley to the Potomac. Lee hoped that this threat to Washington would force Grant to return part of his army to the capital and protect it from an embarrassing capture by the Confederates. Lee was inspired by a similar Shenandoah campaign by Stonewall Jackson in 1862, in which Jackson occupied three Federal armies in a brilliant military show. However, the circumstances were different in 1864. Grant now had plenty of men, and Lee was stretched thin around the Richmond-Petersburg perimeter.

Still, the first part of Early's raid was successful. His force crossed the Potomac on July 6, and a cavalry brigade under John McCausland rode into Hagerstown. Early instructed McCausland to demand $200,000 from the city officials of Hagerstown for damages caused by Hunter in the Shenandoah Valley, but McCausland felt the amount was too large, so he asked for $20,000. After receiving the money, Early's army turned southeast toward Washington. The Confederates reached the outskirts of the city before being turned away by troops from Grant's army

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