Lee's major reason for invading North in 1863?

Was it to win foreign intervention, obtain guns and ammunition, or seek revenge for northern attacks in Virginia? Also, was slave uprising against southern plantations NOT a factor in the defeat of South in 1865?? Please help me, can't find the answers in my book. Thx!Lee's major reason for invading North in 1863?
The President of the Confederated States of America, Jefferson Davis, had given lee a letter for terms of surrender, to end the war, that was to be delivered to the desk of Abraham Lincoln after Robert E. Lee defeated the Northern Army of the Potomac. To accomplish this task, Lee had to invade the north in order to initiate another battle. Ironically, the Southern army entered into Gettysburg from the north and the Northern army entered from the South. The Battle of Gettysburg occured July 1st - July 3rd. Unfortunately for Lee and his army, General Thomas "Stonewall" Jackson had been recently killed at the battle of Chancellorsville and Lee was suffering from the first attacks of Heart Disease, which would eventually kill him. As you are probably aware, the North won and the American Civil War raged on for two more years until the surrender of Lee's battered army at Appomattox on April 9th, 1865.
revenge and utter stupidity, I think that is when the war passed Lee byLee's major reason for invading North in 1863?
You should be able to find Lee's motives for the invasion: food, shoes, and other supplies. The North had plenty, the South had little, so Lee went to get some of theirs.



Also, he was hoping that an invasion might spark rebellion in some of the border states, like Maryland and Delaware, that were slave states, but had not seceded from the Federal Union.
After Antietam, he believed his Army was indestructible. He was hoping to force a compromise and bring the war to an end. Lee was very ill during this time, he had lost his right hand man (Jackson). He wanted the war to be over. He hoped to win or for Lincoln to want to end it.