Final answer:
President Lincoln described the Proclamation as an act of justice and military necessity to weaken the Confederacy and end slavery.
Step-by-step explanation:
President Abraham Lincoln described the Emancipation Proclamation of January 1, 1863 as a necessary measure to end slavery and bring about freedom for African Americans. He stated that the Proclamation was an act of justice and a military necessity to weaken the Confederate states. Lincoln emphasized that the Proclamation was limited to areas under Confederate control and did not immediately free all slaves.
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