The proposed constitutional amendment is interesting, for several reasons. It would have provided funding to States where slavery remained lawful, apparently for compensating slave owners, if emancipation occurred before January 1, 1900; and it authorized possible resettlement of former slaves, somewhere outside the United State.
Those who see the conflict as some sort of 'anti-slavery crusade' might be disturbed by Mr. Lincoln's proposal, but he obviously was extremely pragmatic, when it came to human bondage. His focus on preserving the union was equally obvious, although I would find that obsession easier to understand, if the Constitution either explicitly prohibited, or necessarily implied a prohibition of, State seccession. But no clear restriction on secession existed, prior to ratification of the 14th Amendment...
“. . . it authorized possible resettlement of former slaves, somewhere outside the United State.”
This may explain why it was not talked about too much in my school’s history classes. Mention of this provision might have raised questions about President Lincoln’s commitment to the notion that “all men are created equal.”