In middle school, you learn that Abraham Lincoln's goal was to preserve the union...and also to free the slaves.
In high school you learn that Abraham Lincoln's primary goal was to keep the south from seceding/preserve the union. Slavery was just a loose end.
In college you learn that Abraham Lincoln didn't give a good gah'damn about your black ass. If he could keep slavery going and still appease the north and the south, he would've done it and you would likely still be pickin cotton on Massa's plantation to this very day. Lincoln's stance on slavery, the civil war, and the preservation of the Union were (as stated by Lincoln himself):
"If I could save the Union without freeing any slave I would do it, and if I could save it by freeing all slaves I would do it; and if I could save it by freeing some and leaving others alone I would also do that."Not only that, but you learn the Emancipation Proclamation didn't free all the slaves. The Emancipation Proclamation freed the slaves in the states that rebelled against the Union. There were several states that had slaves that did not secede from the Union. Because they were loyal to the Union, Lincoln did not take their slaves away so that he could keep their loyalty during the war. In addition, freed blacks were now "allowed" to fight for the Union (which was already in desperate need of manpower). Hmph! If you want to get really technical, the Emancipation Proclamation didn't free anyone as i'm sure the southern states that seceded didn't give a flying fig about laws passed by a country that they didn't consider themselves part of anymore.
And now there are certain states trying to re-write history. For example, Texas try to change the verbage of their history textbooks to call the Trans-Atlantic Slave Trade to the "Atlantic Triangular Trade" (as in to apply that we were all just one big happy trading family and downplay the fact that millions of Africans were forcibly snatched from the continent, a good number of whom were thrown off of slaves ships during the journey). SMH. I wouldn't be surprised if in 50 years children don't even know that slavery happened. America....
The lies that we were told!