The first time (September 1862), he was hoping to force Maryland into the Confederacy.
The second time (June 1863), he was wanting to invade the prosperous state of Pennsylvania, to feed and equip his barefoot troops.
The North hoped to accomplish several things there.
Lee was hoping to take pressure off of the siege of Vicksburg, hoping the North would recall troops from the West to counter his threat. He also hoped that by putting pressure on the North, he could show that the South was still robust and not ready to collapse, as some in the North hoped. He wanted to force Washington to sue for peace under military threat, and he wanted to take some of the strain off of Virginia, which had borne the brunt of the fighting in the Eastern Theater of Operations since 1861. By capturing provisions, he also hoped to supplement his meager material resources.
No, it was the North that had to do the invading. Support was pretty solid, in defence of the cotton revenues.
The Allies attacked Italy after successfully invading Sicily first.
Home ground advantage. The North had the task of doing the invading.
General Robert E. Lee hoped to accomplish two main objectives by invading the North during the Civil War. First, he aimed to relieve pressure on Virginia by shifting the conflict into Northern territory, thereby allowing Southern farmers to harvest their crops. Second, Lee sought to sway public opinion in the North against the war, potentially encouraging peace negotiations and recognizing the Confederacy's independence.
The North hoped to accomplish several things there.
The first time (September 1862), he was hoping to force Maryland into the Confederacy. The second time (June 1863), he was wanting to invade the prosperous state of Pennsylvania, to feed and equip his barefoot troops.
North invaded South.
Lee was hoping to take pressure off of the siege of Vicksburg, hoping the North would recall troops from the West to counter his threat. He also hoped that by putting pressure on the North, he could show that the South was still robust and not ready to collapse, as some in the North hoped. He wanted to force Washington to sue for peace under military threat, and he wanted to take some of the strain off of Virginia, which had borne the brunt of the fighting in the Eastern Theater of Operations since 1861. By capturing provisions, he also hoped to supplement his meager material resources.
Followed the order of Qin Shihuang, the Great Wall of China was constructed to keep the Xiongnu from invading from the north and the west.
The North was invading an unfamiliar territory and most of the generals were inexperienced or inept.
North Korea by invading South Korea.
Normans in the south and vikings in the north
Nil it is just propaganda
Lee had a number of reasons to invade the North. He marched the Army of Northern Virginia north with vigor after his remarkable victory over his outnumbered troops at Chancellorsville. Lee moved north to take pressure off the besieged town of Vicksburg. The other goal was to capture the capitol of Pennsylvania, Harrisburg. If successful his hope was to damage the morale of the North and aid the Confederacy's efforts to have European powers recognize the independence of the Confederacy. Gettysburg was not a planned battle and it was by chance along with the unexpected resignation of Union General Hooker from leading the Army of the Potomac.
The North had to do the invading, so the South had to react with defensive tactics.