Start with “This effectively ended the slavery problem for the Union states”.
It ended nothing but the state of uneasy truce between the hot-heads of either side. It added immeasurably to the tensions between neighbors and the insurrection introduced us to a state of war.
The slave problem was still there and wouldn’t be resolved until the passage of the 13th amendment.
Of course the "slave problem" was doing just fine in places like Missouri, Maryland, Kentucky and Delaware.
It wasn't causing any problems at all. No need to invade and murder people in those states because they were still licking their masters' feet.
Wrong again, Opie.
disHonest Abe's illegal invasion "introduced us to a state of war".