The North fought the most destructive and costliest war in our history to preserve slave states remaining in the Union *WITH* slavery intact. Stop ignoring the truth. If they had quickly won, slavery would have continued to be legal in the Union.
What the Union did had nothing to do with eradicating slavery, and everything to do with maintaining economic power. You deliberately attempt to deceive people by continuously claiming that Union actions had anything to do with stopping slavery, when they did not.
Abolishing slavery was just a revenge for the Union and destroying the economic power of their enemy. There original intent was to keep it going.
Objectively Union actions were definitely affecting slavery.
Military actions deep inside the South caused many more to runaway to the Union army. The actual numbers of Runaways prior to that were small. Often when one was captured the crowd which gathered bought him from his owner and freed him.
There was a many-sided coalition supporting the War. Lincoln’s innate ability deftly allowed him to keep it together.
Preserving the greatest Union in history was worth the bloodshed.
And there is no “side” one side won and the other side lost.