Whereas Jefferson only proclaimed that all men were created equal, Lincoln ensured it was so by enshrining that fact on the battlefield.
Again, this is a bait and switch. Lincoln did not commit troops to the battlefield to end slavery. Lincoln committed troops to the battlefield to end the cause of Independence for Southern States. Up until at least August 22 of 1862, Lincoln was willing to keep slavery if the Southern States would stop fighting Dominance from Washington D.C.
Nearly a year and a half after the war had begun, Lincoln was still not fighting to end slavery, he was fighting to end Independence.
"Ending slavery" got added on as justification for the bloodshed long after the fact.
Sometimes in politics as in life things are not said when everyone knows those things are there. Lincoln always wanted to eliminate slavery as everyone should also have wanted.