Describe how the war to save the Union became the war to end slavery.

When the
Civil War began with the secession of Southern states from the Union, Lincoln was quite willing
to allow these states to continue slavery if it would preserve the Unionin other words, if they
would come back to the United States.

However, as the war dragged on, and it
became clear these states were not going to return until they were utterly defeated, Lincoln
became anxious to hasten that victory. He thought freeing the slaves would encourage the
newly-freed slaves as well as already free blacks to fight for the union cause, further draining
resources from the South. When he issued the Emancipation Proclamation in 1863, that effectively
turned a war against breaking up the union into a war to end slavery. The war did drag on for
two years longer, but after 1863, it was clear that the end of the war would mean
the...