...Sure, the North fought the war to end slavery. ....
More accurate to say the scumbag criminals of the so-called 'confederacy' started the war to preserve slavery.
So the North and South agreed that the war was over the South leaving ......
No, they did not agree on that. Read a fucking book once in a while, stupid.
The South left and attacked the North at Fort Sumpter to make them leave.
The North invaded the South to conquer them and make them stay.
Leaving was an end goal for the South. They didn't say we'll stay if we can continue to own slaves. You think that because you're incompetent at your job.
The North gave them no offer to leave. Lincoln did offer them slavery to stay and they turned it down. Since you don't know American history, Google it.
Clearly slavery was intertwined in the war, I never disagreed with that. But someone who is trained in history and thinks the war was just over slavery is flamingly inept