Final answer:
The Emancipation Proclamation had several effects: it declared all slaves in Confederate territory to be free, encouraged European support for the Union troops, and helped prevent British aid to the South.
Step-by-step explanation:
The Emancipation Proclamation had several effects. First, it declared that all slaves in Confederate territory were to be set free. However, it did not actually free any slaves in areas under Union control. Second, it played a significant role in encouraging European support for the Union troops during the American Civil War. Third, it helped prevent Britain from aiding the South, as Britain had abolished slavery and supporting a country that still practiced slavery would have gone against their principles.
Learn more about Effects of the Emancipation Proclamation