Well, except for Robert E. Lee invading Maryland in 1862...
"If he remained in Virginia, Lee would be forced to react to Union movements, whereas in Maryland or Pennsylvania he would hold the initiative. Lee believed he could easily flank the enemy by crossing the Potomac upriver from Washington and marching the Army of Northern Virginia through Maryland. A short thrust into Union territory would not be enough; a protracted stay would be the key to Confederate success. Lee hoped to keep his army on United States soil through much of the autumn, not with the intention of capturing and holding territory but with an eye toward accomplishing several goals before returning to Virginia as winter approached."
Oh, and except for General Bragg and Smith invading Kentucky that same year.
"Generals Braxton Bragg and Edmund Kirby Smith held similar ambitions with their invasion that fall, with the less sweeping hope of pushing Kentucky into official, active support of the Confederacy"
Oh, and then General Lee's second invasion in July of 1863.
"In June 1863, Confederate general Robert E. Lee and his Army of Northern Virginia invaded the North in hopes of relieving pressure on war-torn Virginia, defeating the Union Army of the Potomac on Northern soil, and striking a decisive blow to Northern morale. George G. Meade had commanded the Union army only three days when his advance columns collided unexpectedly with Confederates at the small town of Gettysburg in southeastern Pennsylvania. Fighting raged for three days, inflicted a combined 51,000 casualties, and climaxed on July 3 with the doomed Confederate frontal assault known as Pickett's Charge. "
But other than that...
Nay, you are just totally wrong !
At first, the Confederacy simply wanted to survive and defend its right to secede. They had no interest in invading Union territory. As the Union army went on the offense and prepared to invade the South, the Confederate army went on the defense and prepared themselves for attack.
Due to the Confederate army’s small size, Confederate President Jefferson Davis planned to avoid major battles with the Union army to prevent annihilation of his army and instead planned to only participate in small, limited engagements when the odds were in their favor.
“Lee understood from the beginning of the war that the Confederacy’s best hope for independence rested upon the morale of the Northern people. If they believed the war could not be won, or could only be won at too high a cost, then Southern independence became a real possibility. Confederate military successes were the means to erode morale and create this political climate. The fall elections in the North were approaching. England and France stood on the sidelines watching closely, carefully weighing whether they should recognize the Confederacy. Lee sensed a great opportunity was at hand. He believed the Union army was disorganized and demoralized. He also knew that it was receiving many reinforcements in the form of newly raised regiments in answer to President Lincoln’s July call for 300,000 volunteers. Only one move would force the Federals to place their army in the field before they had reorganized and offered the best chance to do further damage to Northern morale: Invade the border state of Maryland.”
By invading Maryland and posing a threat to cities like Harrisburg, Philadelphia and even Washington D.C., Lee believed it would encourage secessionists in those areas and would pressure Lincoln and other leaders to curtail military operations or perhaps negotiate with the Confederates.