The Battle of Boonsboro (South Mountain) was fought in Washington and Frederick counties in Maryland September 14, 1862. It was a part of Lee's Maryland Campaign which culminated in the bloody Battle of Antietam (Sharpsburg) September 17 1862.
See the following link for more about the battle.
The battle of Gettysburg
His first attempt at invading the North was stopped at Antietam. The second was stopped at Gettysburg.
Gettysburg
the discovery of lees battle plans
Robert E. Lee was one of the confederate generals but first agreed to fight for the north.
The north was fighting the south and the north win the battle of the war
The North called it the First Battle of Bull Run, and South called it the first Battle of Manassas.
Virginia, 1861, known as the First Battle of Bull Run in the North, and the First Battle of Manassas in the South.
Palmerston North City
Second Manassas, Seven Days, Chancellorsville…
Both Antietam and Gettysburg were fought in the North.
The first battle of the Civil War was the First Battle of Bull Run aka The First Battle of Manassas at Manassas. The north fully expected a quick blowout but were amazing defeated by the south.